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Java GUI编程lesson05-Button

程序员文章站 2022-07-06 11:04:11
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Button组件

顾名思义就是按钮,提到button组件就还要涉及到布局管理器

布局管理器Layout

Frame布局管理器的三种布局:

  • 流式布局
  • 环绕性布局
  • 表格布局

布局的使用

1.流式布局(FlowLayout)

public class TestFlowLayout {
    public static void main(String[] args) {
        //new一个Frame窗口
        Frame frame = new Frame();

        //new button按钮组件
        Button button1 = new Button("button1");
        Button button2 = new Button("button2");
        Button button3 = new Button("button3");

        //设置为流式布局
        frame.setLayout(new FlowLayout());//默认为居中
//        frame.setLayout(new FlowLayout(FlowLayout.LEFT));//靠左
//        frame.setLayout(new FlowLayout(FlowLayout.RIGHT));//靠右
//        frame.setLayout(new FlowLayout(FlowLayout.LEADING));//行首
//        frame.setLayout(new FlowLayout(FlowLayout.TRAILING));//行末

        //设置窗口大小
        frame.setSize(200, 200);

        //设置窗口可见
        frame.setVisible(true);

        //添加button组件
        frame.add(button1);
        frame.add(button2);
        frame.add(button3);
     

        //监听窗口关闭事件
        frame.addWindowListener(new WindowAdapter() {
            @Override
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });
    }
}

效果展示:
Java GUI编程lesson05-Button

2.环绕性布局(BorderLayout)

public class TestBorderLayout {
    public static void main(String[] args) {
        //new Frame窗口
        Frame frame = new Frame("TestBorderLayout");

        //new button按钮
        Button east = new Button("East");
        Button west = new Button("West");
        Button south = new Button("South");
        Button north = new Button("North");
        Button center = new Button("Center");

        //环绕型布局的五个位置:东,西,南,北,中
        frame.add(east, BorderLayout.EAST);
        frame.add(west, BorderLayout.WEST);
        frame.add(south, BorderLayout.SOUTH);
        frame.add(north, BorderLayout.NORTH);
        frame.add(center, BorderLayout.CENTER);

        //窗口可见性
        frame.setVisible(true);
        
        //窗口初始化大小
        frame.setSize(400,400);
        
        //窗口关闭监听事件
        frame.addWindowListener(new WindowAdapter() {
            @Override
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });
    }
}

效果展示:
Java GUI编程lesson05-Button
3.表格布局(GirdLayout)

public class TestGridLayout {
    public static void main(String[] args) {
        //new Frame窗口
        Frame frame = new Frame("TestBorderLayout");

        //new button按钮
        Button btn1 = new Button("btn1");
        Button btn2 = new Button("btn2");
        Button btn3 = new Button("btn3");
        Button btn4 = new Button("btn4");
        Button btn5 = new Button("btn5");
        Button btn6 = new Button("btn6");

        //设置布局为表格布局三行两列
        frame.setLayout(new GridLayout(3, 2));

        //添加按钮
        frame.add(btn1);
        frame.add(btn2);
        frame.add(btn3);
        frame.add(btn4);
        frame.add(btn5);
        frame.add(btn6);

        //设置可见性
        frame.setVisible(true);
        
        //pack()函数可以自动适应布局
        frame.pack();
        
        //设置窗口关闭监听器
        frame.addWindowListener(new WindowAdapter() {
            @Override
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });
    }
}

效果展示
Java GUI编程lesson05-Button

相关标签: java