import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.RandomAccessFile;
import java.util.StringTokenizer;

import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.mapred.JobConf;


// this example is testing for static valiable value
// it will show the value of static valiable is related to Class, not object

class testb {
	// object variable
	public void read() {
		System.out.println(test.sna);
	}
}

public class test {
	int na;
	static int sna;
	static String str;
	public test() {
	}

	public test(String st) {
		str = st;
	}

	public test(int a, int b, String st) {
		na = a;
		sna = b;
		str = st;
	}

	public void print(String str) {
		System.out.println(str);
	}

	@SuppressWarnings( { "static-access" })
	public void strToken() throws IOException {
		test a = new test(1, 2, "a");
		a.print("a.na = " + a.na);
		a.print("test.sna = " + test.sna);

		a.print("a.sna = " + a.sna); // warning about it's not a regular
		// accessing method

		test b = new test(3, 4, "a");
		b.print("b.na = " + b.na);
		b.print("test.sna = " + test.sna);
		b.print("b.sna = " + b.sna); // warning about it's not a regular
		// accessing method

		a.print("a.sna = " + a.sna); // a.sna = test.sna -> b.sna
		String tmp[] = test.str.split(":");
		String Column_Family = tmp[0] + ":";
		a.print("column family = " + Column_Family);
		a.print("ori str = " + test.str);
		// test fileoutputstream
		FileOutputStream out = new FileOutputStream(new File(
				"/home/waue/mr-result.txt"));
		out.write("hello".getBytes());
		out.close();
		// test randomaccessfile
		RandomAccessFile raf = new RandomAccessFile("/home/waue/mr-result.txt",
				"rw");
		raf.seek(raf.length()); // move pointer to end
		raf.write("\n go \t ahead".getBytes());
		raf.close();
		// test StringTokenizer
		StringTokenizer st = new StringTokenizer("this is a test");
		while (st.hasMoreTokens()) {
			System.out.println(st.nextToken());
		}
	}

	String parseFirstLine(String in, String ou) throws IOException {
		BufferedReader fi = new BufferedReader(new FileReader(new File(in)));
		BufferedWriter fw = new BufferedWriter(new FileWriter(new File(ou)));
		String first_line, data;
		first_line = fi.readLine();
		do {
			data = fi.readLine();
			if (data == null) {
				break;
			} else {
				fw.write(data + "\n");
			}
		} while (true);
		fw.close();
		return first_line;
	}

	boolean deleteFile(String str) throws IOException {
		File ttt = new File(str);
		if (ttt.exists()) {
			if (!ttt.delete()) {
				System.err.print("delete file error !");
			}
		} else {
			System.out.println("file not exit!");
		}
		return true;
	}

	void ttt() throws IOException {
		Path pi;
		JobConf conf = new JobConf(test.class);
		FileStatus[] fi = FileSystem.get(conf).listStatus(
				new Path("/user/waue/input/"));
		for (int i = 0; i < fi.length; i++) {
			pi = fi[i].getPath();
			System.out.println(pi.getName());
		}
	}

	public static void main(String[] args) throws IOException {
		// test a = new test();
		// a.strToken();
		// System.out.println(a.parseFirstLine("/home/waue/test.txt",
		// "/home/waue/out.tmp.txt"));
		// ttt();
		
		
		animal a = new animal();
		bird b = new bird();
		dog d = new dog(b);
		animal aaa = new bird();
//		dog ddd = new animal();  -> error 
		
		animal aa = (animal) b;
		System.out.println(aa.hand);
		System.out.println(aa.mind);		
//		bird bb = (bird) a; -> error
//		d.setbird(aa); -> error
//		System.out.println(aa.feather); -> error

		// Fu <T>
		Fu<? extends String> ak;
		ak = new Fu<String>();
		ak.getFu();
		Fu<?> in = ak;
//		in.setFu("ss"); -> error
		in.getFu();
	}
}
class Fu <T>{
	T go;
	void setFu(T go){
		this.go = go;
	}
	T getFu(){
		return go;
	}
}

class animal{
	String head = "head";
	String feet = "feet";
	String body = "body";
	String hand = "head";
	String mind = "mind";
	int id = 1234567;
}
class bird extends animal{
	String feather = "feather";
	bird(){
		hand = "wing";
		id = 1234568;
		System.out.println(head + hand + body + feet + "id="+id);
		System.out.println("super = " + super.hand +"this = " + this.hand);
	}
}
class dog extends animal{
	dog(animal a){
		System.out.println(a.head + hand + body + feet + "id="+id);
	}
	void setbird(bird b){
		System.out.println(b.head + hand + body + feet + "id="+id);
	}
}