guiprintstream.java

实现算法与界面设计的完全分离。很好的封装自己的词法分析程序

import java.io.File;
import java.io.FileNotFoundException;
import java.io.OutputStream;
import java.io.PrintStream;
import java.io.UnsupportedEncodingException;

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import java.io.OutputStream;
import java.io.PrintStream;
import javax.swing.SwingUtilities;
import javax.swing.text.JTextComponent;


public class GUIPrintStream extends PrintStream{
    
    private JTextComponent component;
    private StringBuffer sb = new StringBuffer();
    
    public GUIPrintStream(OutputStream out, JTextComponent component){
        super(out);
        this.component = component;
    }
    
    public void write(byte[] buf, int off, int len) {
        final String message = new String(buf, off, len);
        SwingUtilities.invokeLater(new Runnable(){
            public void run(){
                sb.append(message);
                component.setText(sb.toString());
            }
        });
    }
}