learning java AWT 布局管理器 GridLayout

GridLayout布局管理器将容器分割成纵横线分格的网格，每个网格所占的区域大小相同。

import java.awt.*;

public class GridLayoutTest {
    public static void main(String[] args) {
        var f = new Frame("计算器");
        f.setLayout(new BorderLayout());
        var p1 = new Panel();
        p1.add(new TextField(20));

        f.add(p1, BorderLayout.NORTH);

        var p2 = new Panel();
        p2.setLayout(new GridLayout(3,5,4,4));

        String[] name = {"0","1","2","3","4","5","6", "7","8","9","+","-","*","/","."};
        for (var i = 0; i < name.length ;i++){
            p2.add(new Button(name[i]));
        }
        f.add(p2);
        f.pack();
        f.setVisible(true);
    }
}

output: