Swing—标签

Swing—标签
label

new JLabel("xxx")
图标 ICON

package com.deng.lesson04;
​
import javax.swing.;
import java.awt.;
​
//图标，需要实现类，Frame继承
public class IconDemo extends JFrame implements Icon {
​
private int width;
private int height;
​
   public IconDemo(){}
   public IconDemo(int width,int height){
   this.width =width;
   this.height =height;
  }
   public void init(){
       IconDemo iconDemo = new IconDemo(30, 30);
       //图标放在标签上，也可以放在按钮上
       JLabel label = new JLabel("icontest", iconDemo, SwingConstants.CENTER);
​
       Container container = getContentPane();
       container.add(label);
​
       this.setVisible(true);
       this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
  }
​
   public static void main(String[] args) {
       new IconDemo().init();
  }
   @Override
   public void paintIcon(Component c, Graphics g, int x, int y) {
       
       g.fillOval(x,y,width,height);
  }
   @Override
   public int getIconWidth() {
       
       return this.width;
  }
   @Override
   public int getIconHeight() {
       
       return this.height;
  }
}
图片ICON

package com.deng.lesson04;
​
import javax.swing.;
import java.awt.;
import java.net.URL;
​
public class ImageIconDemo extends JFrame {
​
   public ImageIconDemo(){
       //获取图片的地址
       JLabel label = new JLabel("ImageIcon");
       URL url = ImageIconDemo.class.getResource("tx.jpg");
​
       ImageIcon imageIcon = new ImageIcon(url);//命名不要冲突
       label.setIcon(imageIcon);
       label.setHorizontalAlignment(SwingConstants.CENTER);
​
       Container container = getContentPane();
       container.add(label);
​
       setVisible(true);
       setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
​
  }
​
   public static void main(String[] args) {
       new ImageIconDemo();
  }
}