java 测试Piped* 报错，求大神指点，谢谢！
[code=Java][/code]
package com.pipedstream;

import java.io.*;

public class PipedStreamTest {

/**

* @param args

*/

public static void main(String[] args){

// TODO Auto-generated method stub

Thread t1 = new Sender();

Thread t2 = new Receiver();

PipedOutputStream os=t1.getOutput(); //The method getOutput() is undefined for the type Thread

PipedInputStream is=t2.getInput(); //The method getInput() is undefined for the type Thread

is.connect(os);

t1.start();

t2.start();

}

}


class Sender extends Thread {
private PipedOutputStream out = new PipedOutputStream();

public PipedOutputStream getOutput(){

return out;

}

public void run(){

try{

out.write("hello".getBytes());

out.close();

}catch(IOException e){

e.printStackTrace();

}


}
}


class Receiver extends Thread {



private PipedInputStream in = new PipedInputStream();

public PipedInputStream getInput(){

return in;

}

public void run(){

byte[] buf = new byte[1024];

try{

int len = in.read(buf);

System.out.println("receive from sender:\n"+new String(buf,0,len));

in.close();

}catch(IOException e){

e.printStackTrace();

}



}


}
问：大家帮忙看一下main（）函数提示的两个错误，找不到问题···


[解决办法]

Java code

import java.io.*;public class PipedStreamTest {    /**     *     * @param args     *     */    public static void main(String[] args) {// TODO Auto-generated method stub        Sender t1 = new Sender();        Receiver t2 = new Receiver();        PipedOutputStream os = t1.getOutput(); //The method getOutput() is undefined for the type Thread        PipedInputStream is = t2.getInput(); //The method getInput() is undefined for the type Thread        try {            is.connect(os);        } catch (IOException e) {            e.printStackTrace();        }        t1.start();        t2.start();    }}class Sender extends Thread {    private PipedOutputStream out = new PipedOutputStream();    public PipedOutputStream getOutput() {        return out;    }    public void run() {        try {            out.write("hello".getBytes());            out.close();        } catch (IOException e) {            e.printStackTrace();        }    }}class Receiver extends Thread {    private PipedInputStream in = new PipedInputStream();    public PipedInputStream getInput() {        return in;    }    public void run() {        byte[] buf = new byte[1024];        try {            int len = in.read(buf);            System.out.println("receive from sender:\n" + new String(buf, 0, len));            in.close();        } catch (IOException e) {            e.printStackTrace();        }    }}
[解决办法]
你定义的类型不对