fenster erweitern durch button

[chip]

hallo

ich hab gerade ein echtes problem, und zwar will ich per button ein fenster vergrößern.

ich hab mal hier ein beispieltext erstellt.
könnt ihr mir da bitte weiterhelfen
danke

import java.awt.*; 
import java.awt.event.*; 

public class Bild8 extends Frame implements WindowListener,
ActionListener {
	Button ew;
	public Bild8() {
		Frame window = new Frame("");
		window.addWindowListener(this);
		window.setTitle("Roche");
		window.setLocation(200, 200); 
		window.setSize(165,280);
		
		ew= new Button("ew");
		ew.setSize(40,40);
		ew.setLocation(30,80);
		ew.addActionListener(this);

		window.add(ew);
		window.setVisible(true);
	}

	public void actionPerformed(ActionEvent ea) { 
		String but = ea.getActionCommand(); 
		if (but=="ew") {}
	}

	public static void main(String[] args) { 
		Bild8 meinFenster = new Bild8(); 
	}
	
	public void windowClosing(WindowEvent e) { System.exit(0);  } 
	public void windowActivated(WindowEvent e) {} 
	public void windowClosed(WindowEvent e) {} 
	public void windowDeactivated(WindowEvent e) {} 
	public void windowDeiconified(WindowEvent e) {} 
	public void windowIconified(WindowEvent e) {} 
	public void windowOpened(WindowEvent e) {} 

}

 

[foobar]

public void actionPerformed(ActionEvent ea) {
      String but = ea.getActionCommand();
      if (but=="ew") 
    {
       this.setSize(300, 300);
    }
   }

 

[chip]

nee :?:
das klappt so leider nicht :cry:

 

[foobar]

So macht das ganze mehr Sinn:

import java.awt.Button;
import java.awt.Frame;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowEvent;
import java.awt.event.WindowListener;


public class Bild8 extends Frame implements WindowListener, ActionListener
{
    private Button ew;

    public Bild8()
    {

        this.addWindowListener(this);
        this.setTitle("Roche");
        this.setLocation(200, 200);
        this.setSize(165, 280);

        ew = new Button("ew");
        ew.setSize(40, 40);
        ew.setLocation(30, 80);
        ew.addActionListener(this);

        this.add(ew);
        this.setVisible(true);
    }

    public void actionPerformed(ActionEvent ea)
    {
        String but = ea.getActionCommand();
        if (but == "ew")
        {
           this.setSize(300, 300);
           System.out.println("click");
        }
    }

    public static void main(String[] args)
    {
        Bild8 meinFenster = new Bild8();
    }

    public void windowClosing(WindowEvent e)
    {
        System.exit(0);
    }

    public void windowActivated(WindowEvent e)
    {
    }

    public void windowClosed(WindowEvent e)
    {
    }

    public void windowDeactivated(WindowEvent e)
    {
    }

    public void windowDeiconified(WindowEvent e)
    {
    }

    public void windowIconified(WindowEvent e)
    {
    }

    public void windowOpened(WindowEvent e)
    {
    }

}