Java 窗體背景圖+設置按鈕樣式

這個方法應該是比較麻煩的做法，因為背景圖是放在窗體的第二層，如果窗體內容層有很多面板，就得挨個設置透明。話不多說，上代碼：

import java.awt.Color;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

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

public class Background extends JFrame {
    
    
    public static void main(String[] args) {
        new Background();
    }
    
    Background() {    
        this.setTitle("Background");
        this.setLayout(new FlowLayout());
        JButton jb = new JButton("測試");
        this.add(jb);
        
        //放置背景圖
        ImageIcon background = new ImageIcon(Background.class.getClassLoader().getResource("images/img.jpg"));
        JLabel bkLabel = new JLabel(background);
        bkLabel.setBounds(0, 0,background.getIconWidth(), background.getIconHeight());
        this.setSize(background.getIconWidth(), background.getIconHeight());
        this.getLayeredPane().add(bkLabel,new Integer(Integer.MIN_VALUE));
        JPanel ctPanel = (JPanel)this.getContentPane();
        ctPanel.setOpaque(false);
        
        //設置按鈕樣式
        jb.setPreferredSize(new Dimension(100,40));//設置大小
        jb.setBackground(new Color(118,238,0));//設置背景色
        jb.setForeground(Color.WHITE);//設置前景色
        jb.setFont(new  java.awt.Font("微軟楷體",  1,  20)); //設置字體樣式
        
        this.addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent arg0) {
                System.exit(0);
            }            
        });
        this.setVisible(true);
    }

}

 

 圖片放置：（創建的Java項目里的）src > New > Folder > Folder name:images > finish，染回將圖片粘貼到images里

效果圖：