1 | import java.io.BufferedReader; |
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2 | import java.io.BufferedWriter; |
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3 | import java.io.File; |
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4 | import java.io.FileOutputStream; |
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5 | import java.io.FileReader; |
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6 | import java.io.FileWriter; |
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7 | import java.io.IOException; |
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8 | import java.io.RandomAccessFile; |
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9 | import java.text.SimpleDateFormat; |
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10 | import java.util.Date; |
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11 | import java.util.Locale; |
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12 | import java.util.StringTokenizer; |
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13 | import java.util.regex.Matcher; |
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14 | import java.util.regex.Pattern; |
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15 | |
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16 | import org.apache.hadoop.fs.FileStatus; |
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17 | import org.apache.hadoop.fs.FileSystem; |
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18 | import org.apache.hadoop.fs.Path; |
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19 | import org.apache.hadoop.mapred.JobConf; |
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20 | |
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21 | // this example is testing for static valiable value |
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22 | // it will show the value of static valiable is related to Class, not object |
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23 | |
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24 | class testb { |
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25 | // object variable |
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26 | public void read() { |
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27 | System.out.println(test.sna); |
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28 | } |
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29 | } |
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30 | |
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31 | class Fu<T> { |
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32 | T go; |
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33 | |
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34 | void setFu(T go) { |
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35 | this.go = go; |
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36 | } |
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37 | |
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38 | T getFu() { |
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39 | return go; |
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40 | } |
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41 | } |
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42 | |
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43 | class animal { |
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44 | String head = "head"; |
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45 | |
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46 | String feet = "feet"; |
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47 | |
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48 | String body = "body"; |
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49 | |
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50 | String hand = "head"; |
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51 | |
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52 | String mind = "mind"; |
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53 | |
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54 | int id = 1234567; |
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55 | } |
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56 | |
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57 | class bird extends animal { |
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58 | String feather = "feather"; |
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59 | |
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60 | bird() { |
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61 | hand = "wing"; |
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62 | id = 1234568; |
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63 | System.out.println(head + hand + body + feet + "id=" + id); |
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64 | System.out.println("super = " + super.hand + "this = " + this.hand); |
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65 | } |
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66 | } |
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67 | |
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68 | class dog extends animal { |
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69 | dog(animal a) { |
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70 | System.out.println(a.head + hand + body + feet + "id=" + id); |
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71 | } |
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72 | |
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73 | void setbird(bird b) { |
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74 | System.out.println(b.head + hand + body + feet + "id=" + id); |
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75 | } |
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76 | } |
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77 | |
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78 | public class test { |
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79 | int na; |
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80 | |
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81 | static int sna; |
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82 | |
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83 | static String str; |
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84 | |
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85 | public test() { |
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86 | } |
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87 | |
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88 | public test(String st) { |
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89 | str = st; |
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90 | } |
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91 | |
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92 | public test(int a, int b, String st) { |
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93 | na = a; |
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94 | sna = b; |
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95 | str = st; |
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96 | } |
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97 | |
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98 | public void print(String str) { |
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99 | System.out.println(str); |
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100 | } |
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101 | |
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102 | @SuppressWarnings( { "static-access" }) |
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103 | public void strToken() throws IOException { |
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104 | test a = new test(1, 2, "a"); |
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105 | a.print("a.na = " + a.na); |
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106 | a.print("test.sna = " + test.sna); |
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107 | |
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108 | a.print("a.sna = " + a.sna); // warning about it's not a regular |
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109 | // accessing method |
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110 | |
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111 | test b = new test(3, 4, "a"); |
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112 | b.print("b.na = " + b.na); |
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113 | b.print("test.sna = " + test.sna); |
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114 | b.print("b.sna = " + b.sna); // warning about it's not a regular |
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115 | // accessing method |
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116 | |
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117 | a.print("a.sna = " + a.sna); // a.sna = test.sna -> b.sna |
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118 | String tmp[] = test.str.split(":"); |
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119 | String Column_Family = tmp[0] + ":"; |
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120 | a.print("column family = " + Column_Family); |
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121 | a.print("ori str = " + test.str); |
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122 | // test fileoutputstream |
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123 | FileOutputStream out = new FileOutputStream(new File( |
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124 | "/home/waue/mr-result.txt")); |
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125 | out.write("hello".getBytes()); |
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126 | out.close(); |
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127 | // test randomaccessfile |
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128 | RandomAccessFile raf = new RandomAccessFile("/home/waue/mr-result.txt", |
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129 | "rw"); |
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130 | raf.seek(raf.length()); // move pointer to end |
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131 | raf.write("\n go \t ahead".getBytes()); |
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132 | raf.close(); |
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133 | // test StringTokenizer |
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134 | StringTokenizer st = new StringTokenizer("this is a test"); |
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135 | while (st.hasMoreTokens()) { |
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136 | System.out.println(st.nextToken()); |
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137 | } |
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138 | } |
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139 | |
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140 | String parseFirstLine(String in, String ou) throws IOException { |
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141 | BufferedReader fi = new BufferedReader(new FileReader(new File(in))); |
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142 | BufferedWriter fw = new BufferedWriter(new FileWriter(new File(ou))); |
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143 | String first_line, data; |
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144 | first_line = fi.readLine(); |
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145 | do { |
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146 | data = fi.readLine(); |
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147 | if (data == null) { |
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148 | break; |
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149 | } else { |
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150 | fw.write(data + "\n"); |
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151 | } |
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152 | } while (true); |
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153 | fw.close(); |
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154 | return first_line; |
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155 | } |
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156 | |
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157 | boolean deleteFile(String str) throws IOException { |
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158 | File ttt = new File(str); |
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159 | if (ttt.exists()) { |
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160 | if (!ttt.delete()) { |
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161 | System.err.print("delete file error !"); |
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162 | } |
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163 | } else { |
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164 | System.out.println("file not exit!"); |
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165 | } |
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166 | return true; |
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167 | } |
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168 | |
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169 | void Inherbit() { |
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170 | animal a = new animal(); |
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171 | bird b = new bird(); |
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172 | dog d = new dog(b); |
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173 | animal aaa = new bird(); |
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174 | // dog ddd = new animal(); -> error |
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175 | |
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176 | animal aa = (animal) b; |
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177 | System.out.println(aa.hand); |
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178 | System.out.println(aa.mind); |
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179 | // bird bb = (bird) a; -> error |
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180 | // d.setbird(aa); -> error |
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181 | // System.out.println(aa.feather); -> error |
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182 | |
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183 | // Fu <T> |
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184 | Fu<? extends String> ak; |
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185 | ak = new Fu<String>(); |
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186 | ak.getFu(); |
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187 | Fu<?> in = ak; |
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188 | // in.setFu("ss"); -> error |
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189 | in.getFu(); |
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190 | } |
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191 | |
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192 | void ttt() throws IOException { |
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193 | Path pi; |
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194 | JobConf conf = new JobConf(test.class); |
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195 | FileStatus[] fi = FileSystem.get(conf).listStatus( |
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196 | new Path("/user/waue/input/")); |
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197 | for (int i = 0; i < fi.length; i++) { |
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198 | pi = fi[i].getPath(); |
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199 | System.out.println(pi.getName()); |
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200 | } |
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201 | } |
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202 | |
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203 | void parseN() throws IOException { |
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204 | BufferedReader br = new BufferedReader(new FileReader(new File( |
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205 | "/home/waue/Desktop/a"))); |
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206 | // BufferedWriter bw = new BufferedWriter(new FileWriter(new |
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207 | // File("/home/waue/Desktop/b"))); |
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208 | String line = br.readLine(); |
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209 | // char n = '\n'; |
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210 | int Count = 0; |
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211 | do { |
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212 | if (line.isEmpty()) { |
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213 | System.out.println("empty !"); |
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214 | } else { |
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215 | System.out.println(line); |
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216 | } |
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217 | line = br.readLine(); |
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218 | Count++; |
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219 | } while (line != null); |
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220 | |
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221 | } |
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222 | |
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223 | void regular() { |
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224 | Pattern patten_line; |
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225 | Matcher matcher; |
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226 | String logData = new String(); |
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227 | String line = "[**] [1:2003:8] MS-SQL Worm propagation attempt [**]"; |
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228 | // String line = "[**] [1:2189:3] BAD-TRAFFIC IP Proto 103 PIM [**]"; |
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229 | patten_line = Pattern |
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230 | .compile("^\\[\\**\\] \\[([0-9]*):([0-9]*):([0-9]*)\\] ([^\\[]*)\\[\\**\\]$"); |
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231 | matcher = patten_line.matcher(line); |
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232 | System.out.println("go"); |
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233 | if (matcher.matches()) { |
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234 | int number = matcher.groupCount(); |
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235 | String[] data = new String[number]; |
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236 | for (int j = 0; j < number; j++) { |
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237 | data[j] = matcher.group(j + 1); |
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238 | logData += (data[j] + ";"); |
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239 | } |
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240 | |
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241 | System.out.println(logData); |
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242 | } |
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243 | System.out.println("end"); |
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244 | } |
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245 | |
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246 | void enumTest() { |
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247 | for (EnumTest t : EnumTest.values()) { |
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248 | |
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249 | System.out.println(t); |
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250 | } |
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251 | |
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252 | } |
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253 | |
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254 | void Date()throws Exception{ |
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255 | String da = "20/Jul/2008:08:26:55"; |
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256 | SimpleDateFormat sdf = new SimpleDateFormat("dd/MMM/yyyy:HH:mm:ss",Locale.US); |
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257 | Date timestamp = sdf.parse(da); |
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258 | System.out.println(timestamp.toString()); |
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259 | } |
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260 | |
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261 | public static void main(String[] args) throws Exception { |
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262 | |
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263 | test t = new test(); |
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264 | |
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265 | // 測試 strToken函數 |
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266 | // t.strToken(); |
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267 | // 測試 檔案io 與 解析 |
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268 | // System.out.println(a.parseFirstLine("/home/waue/test.txt", |
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269 | // "/home/waue/out.tmp.txt")); |
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270 | // 測試 listStatus |
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271 | // t.ttt(); |
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272 | // 測試 繼承 與 汎型 |
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273 | // t.Inherbit() |
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274 | // 測試 "換行" 是否為 "\n" |
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275 | // t.parseN(); |
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276 | // 測試 正規表示法 |
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277 | // t.regular(); |
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278 | // 測試 enum 列舉 |
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279 | // t.enumTest(); |
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280 | t.Date(); |
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281 | } |
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282 | |
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283 | } |
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284 | |
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285 | enum EnumTest { |
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286 | R, L, GO |
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287 | } |
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