import java.awt.Font;
import java.io.IOException;
import java.io.OutputStream;
import java.io.PrintStream;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.SwingUtilities;
public class reDirect
{/*
* Console重定向到JTextArea
*/
public reDirect()
{JFrame jf=new JFrame();
jf.setBounds(100,100,700,400);
JTextArea jta=new JTextArea();
jta.setFont(new Font(null,Font.BOLD,20));
jta.setEditable(false);//设置不可编辑
JTextAreaOutputStream out = new JTextAreaOutputStream (jta);
System.setOut (new PrintStream (out));//设置输出重定向
System.setErr(new PrintStream(out));//将错误输出也重定向,用于e.pritnStackTrace
JScrollPane jsp=new JScrollPane(jta);//设置滚动条
jf.add(jsp);jf.setVisible(true);
}
public static void main(String[] args){
reDirect rd=new reDirect();
System.out.println("重定向");
System.out.println(12345);
System.out.println(true);
try{
int[] s={1,2,3,4,5};
int i=s[8];
}catch(Exception e){
e.printStackTrace();
}
}
}
class JTextAreaOutputStream extends OutputStream
{
private final JTextArea destination;
public JTextAreaOutputStream (JTextArea destination)
{
if (destination == null)
throw new IllegalArgumentException ("Destination is null");
this.destination = destination;
}
@Override
public void write(byte[] buffer, int offset, int length) throws IOException
{
final String text = new String (buffer, offset, length);
SwingUtilities.invokeLater(new Runnable ()
{
@Override
public void run()
{
destination.append (text);
}
});
}
@Override
public void write(int b) throws IOException
{
write (new byte [] {(byte)b}, 0, 1);
}
}