baos bais 意义

import java.io.BufferedInputStream;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;

import org.junit.Test;

public class testIO {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
@Test
public void test1() throws Exception {
Process exec = Runtime.getRuntime().exec("ipconfig");
InputStream inputStream = exec.getInputStream();
byte[] bytes = new byte[1024];
int len = 0;
//		ByteArrayInputStream bais = new

while((len=inputStream.read(bytes))!=-1) {
//			inputStream.read(bytes);
baos.write(bytes,0,len);
}
baos.flush();

Thread t1 = new Thread(new Runnable() {
byte[] temp = new byte[1024];
byte[] byteArray = baos.toByteArray();
ByteArrayInputStream bais = new ByteArrayInputStream(byteArray);
BufferedInputStream bis = new BufferedInputStream(bais);
int len=0;
StringBuilder sb = new StringBuilder();
public void run() {
// TODO Auto-generated method stub

try {
while((len=bis.read(temp))!=-1) {
sb.append(new String(temp,0,len));
}
System.out.println(sb.toString());
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
});
Thread t2 = new Thread(new Runnable() {
byte[] temp = new byte[1024];
byte[] byteArray = baos.toByteArray();
ByteArrayInputStream bais = new ByteArrayInputStream(byteArray);
BufferedInputStream bis = new BufferedInputStream(bais);
int len=0;
StringBuilder sb = new StringBuilder();
public void run() {
// TODO Auto-generated method stub

try {
while((len=bis.read(temp))!=-1) {
sb.append(new String(temp,0,len));
}
System.out.println(sb.toString());
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
});

t1.start();
t2.start();
}

}