java to byte array_java中tobytearray的用法

importjava.io.*;importjava.lang.Math;publicclassTestDataStream{publicstaticvoidmain(String[]args){ByteArrayOutputStreambaos=newByteArrayOutputStream();DataOutputStreamdos...

import java.io.*;

import java.lang.Math;

public class TestDataStream {

public static void main(String[] args) {

ByteArrayOutputStream baos =

new ByteArrayOutputStream();

DataOutputStream dos =

new DataOutputStream(baos);

try {

dos.writeDouble(Math.random());

dos.writeBoolean(true);

ByteArrayInputStream bais =

new ByteArrayInputStream(baos.toByteArray());

System.out.println(bais.available());

DataInputStream dis = new DataInputStream(bais);

System.out.println(dis.readDouble());

System.out.println(dis.readBoolean());

dos.writeInt(4);

bais = new ByteArrayInputStream(baos.toByteArray());

System.out.println(bais.available());

dis = new DataInputStream(bais);

System.out.println(dis.readInt());

//这个System为什么不能显示出4呢

dos.close(); dis.close();

} catch (IOException e) {

e.printStackTrace();

}

}

}

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