GUI编程：swing之JPanel(面板)与JScrollPane(滚动条)

谁践踏了优雅 2022-11-11 13:12 318阅读 0赞

## JPanel ##

**示例代码：**

//面板       JPanel   
    public class JPanelDemo extends JFrame {
        
        public static void main(String[] args) {
        
            new JPanelDemo();
        }
        public JPanelDemo()  {
        
            Container container = this.getContentPane();
            //GridLayout   表格布局
            container.setLayout(new GridLayout(2,1,10,10));//后面的参数的意思  间距
    
            JPanel jPanel = new JPanel(new GridLayout(1,3));
            JPanel jPanel1 = new JPanel(new GridLayout(1,3));
            JPanel jPanel2 = new JPanel(new GridLayout(1,3));
            JPanel jPanel3 = new JPanel(new GridLayout(1,3));
    
            jPanel.add(new JButton("1"));
            jPanel.add(new JButton("2"));
            jPanel.add(new JButton("3"));
            jPanel1.add(new JButton("1"));
            jPanel1.add(new JButton("2"));
            jPanel1.add(new JButton("3"));
            jPanel2.add(new JButton("1"));
            jPanel2.add(new JButton("2"));
            jPanel2.add(new JButton("3"));
            jPanel3.add(new JButton("1"));
            jPanel3.add(new JButton("2"));
            jPanel3.add(new JButton("3"));
    
            container.add(jPanel);
            container.add(jPanel1);
            container.add(jPanel2);
            container.add(jPanel3);
    
            setVisible(true);
            setBounds(100,100,300,300);
            this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        }
    
    }

## JScrollPane ##

**示例代码：**

//JScrollPane，滚动条    
    public class JScrollDemo extends JFrame {
        
        public JScrollDemo(){
        
            Container container = this.getContentPane();
            //文本域
            JTextArea textArea = new JTextArea(20 ,50);
            textArea.setText("坏银哦");
    
            //JScrollPane，滚动条  
            JScrollPane scrollPane = new JScrollPane(textArea);
            container.add(scrollPane);
    
            this.setBounds(100,100,400,400);
            this.setVisible(true);
            this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        }
        public static void main(String[] args) {
        
            new JScrollDemo();
        }
    }