Java Swing: GUI'yi dinamik olarak değiştirme

Question

Bileşenleri dinamik olarak eklemem gerekiyor. Ayrıca, düzeni dinamik olarak değiştirmem gerekiyor.

Answer 1

Referans için,temel yöntemini gösteren bir sscce. Daha ayrıntılı olan bu example her iki gereksinimi de gösterir: düzeni değiştirir ve bileşenleri dinamik olarak ekler. Dinamik düzenini değiştirmenin

import java.awt.*; 
import java.awt.event.ActionEvent; 
import javax.swing.*; 

/** @see http://stackoverflow.com/questions/5750068 */ 
public class DynamicLayout extends JPanel { 

    private static final LayoutManager H = new GridLayout(1, 0); 
    private static final LayoutManager V = new GridLayout(0, 1); 

    public DynamicLayout() { 
     this.setLayout(H); 
     this.setPreferredSize(new Dimension(320, 240)); 
     for (int i = 0; i < 3; i++) { 
      this.add(new JLabel("Label " + String.valueOf(i), JLabel.CENTER)); 
     } 
    } 

    private void display() { 
     JFrame f = new JFrame("DynamicLayout"); 
     f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
     f.add(this); 
     JPanel p = new JPanel(); 
     p.add(new JButton(new AbstractAction("Horizontal") { 

      @Override 
      public void actionPerformed(ActionEvent e) { 
       DynamicLayout.this.setLayout(H); 
       DynamicLayout.this.validate(); 
      } 
     })); 
     p.add(new JButton(new AbstractAction("Vertical") { 

      @Override 
      public void actionPerformed(ActionEvent e) { 
       DynamicLayout.this.setLayout(V); 
       DynamicLayout.this.validate(); 
      } 
     })); 
     f.add(p, BorderLayout.SOUTH); 
     f.pack(); 
     f.setLocationRelativeTo(null); 
     f.setVisible(true); 
    } 

    public static void main(String[] args) { 
     EventQueue.invokeLater(new Runnable() { 

      @Override 
      public void run() { 
       new DynamicLayout().display(); 
      } 
     }); 
    } 
} 

Answer 2

Örnek:

package swinglayout; 

import java.awt.BorderLayout; 
import java.awt.Container; 
import java.awt.FlowLayout; 
import java.awt.GridLayout; 
import java.awt.event.ActionEvent; 
import java.awt.event.ActionListener; 

import javax.swing.JButton; 
import javax.swing.JFrame; 
import javax.swing.JPanel; 

public class LayoutChanger implements ActionListener{ 
    JButton b1; 
    JButton b2; 
    JButton b3; 
    JButton b4; 
    JButton b5; 
    JButton b6; 
    /** This button set the flowlayout on panel2 with left orientation */ 
    JButton flowLayout; 

    /** This button set the Gridlayout of 2,3 grid on panel2 */ 
    JButton gridLayout; 

    /** This button set the Borderlayout on panel2*/ 
    JButton borderLayout; 

    /** 
    * This panel is control panel where we use button to change 
    * layout of another panel 
    */ 
    JPanel panel; 

    /** This panel contain multiple button from b1 to b6 */ 
    JPanel panel2; 

    JFrame frame; 
    public LayoutChanger() { 
    //set Default Look and Feel on frame 
    JFrame.setDefaultLookAndFeelDecorated(true); 

    frame = new JFrame(); 
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
    Container con = frame.getContentPane(); 
    con.setLayout(new BorderLayout()); 

    panel = new JPanel(); 
    panel2 = new JPanel(); 
    //This button are used to only showing the layout effect 
    b1 = new JButton("HelloButton1"); 
    b2 = new JButton("HelloButton2"); 
    b3 = new JButton("HelloButton3"); 
    b4 = new JButton("HelloButton4"); 
    b5 = new JButton("HelloButton5"); 
    b6 = new JButton("HelloButton6"); 
    // By default panel have layout 
    panel2.add(b1); 
    panel2.add(b2); 
    panel2.add(b3); 
    panel2.add(b4); 
    panel2.add(b5); 
    panel2.add(b6); 
    // Layout changer button 
    flowLayout = new JButton("FlowLayout"); 
    gridLayout = new JButton("GridLayout"); 
    borderLayout = new JButton("BorderLayout"); 

    //call Action listener on every layout changer button 
    flowLayout.addActionListener(this); 
    gridLayout.addActionListener(this); 
    borderLayout.addActionListener(this); 

    panel.add(flowLayout); 
    panel.add(gridLayout); 
    panel.add(borderLayout); 

    // add layout changer button panel at a top 
    //button panel at the center of container 
    con.add(panel, BorderLayout.PAGE_START); 
    con.add(panel2, BorderLayout.CENTER); 

    frame.setVisible(true); 
    frame.pack(); 

    } 

    public void actionPerformed(ActionEvent e) { 

    //set the flowlayout on panel2 
    if(e.getSource() == flowLayout) { 
     FlowLayout flow = new FlowLayout(FlowLayout.LEFT); 
     panel2.setLayout(flow); 
     panel2.validate(); 
    } 

    //set the gridlayout on panel2 
    if(e.getSource() == gridLayout) { 
     GridLayout grid = new GridLayout(2,3); 
     panel2.setLayout(grid); 
     panel2.validate(); 
    } 
    //set the gridlayout but the problem if we don't set the constraint 
    //all button are set on center. So you remove the all button from panel 
    //Then set grid layout on panel and add them with constraints. 
    if(e.getSource() == borderLayout) { 
     panel2.remove(b1); 
     panel2.remove(b2); 
     panel2.remove(b3); 
     panel2.remove(b4); 
     panel2.remove(b5); 
     panel2.remove(b6); 

     BorderLayout border = new BorderLayout(); 
     panel2.setLayout(border); 

     panel2.add(b1,BorderLayout.NORTH); 
     panel2.add(b2,BorderLayout.SOUTH); 
     panel2.add(b3,BorderLayout.EAST); 
     panel2.add(b4,BorderLayout.WEST); 
     panel2.add(b5,BorderLayout.CENTER); 
     panel2.add(b6,BorderLayout.BEFORE_FIRST_LINE); 

     panel2.validate(); 
    } 
    } 
    public static void main(String args[]) { 
    new LayoutChanger(); 
    } 
} 

Bir şey hatırlamak Bu yöntemi demiyorlar panel.If üzerinde yöntemini validate() çağırmak unuttum yok sen panelde yeni düzen ayarlamak olduğunu Düzenlemede değişimin etkisini görmüyorsunuz. Efekti ile yöntemi görmek istiyorsanız yöntemi çağırın, çerçeveyi yeniden boyutlandırmalısınız. sonra kısıtlaması