Demo01
import javax.swing.*;
import javax.swing.border.EmptyBorder;
import java.awt.*;
public class DemoCalculator {
public static void main(String[] args) {
//創建一個JFrame窗體對象
JFrame jFrame = new JFrame("計算器");
//獲取一個容器對象
Container container = jFrame.getContentPane();
//創建一個文本框組件
JTextField jTextField = new JTextField(20);
//獲取一個面板對象
JPanel jPanel = new JPanel(new GridLayout(4,4,5,5));
//向面板中添加按鈕組件
jPanel.add(new JButton("7"));
jPanel.add(new JButton("8"));
jPanel.add(new JButton("9"));
jPanel.add(new JButton("/"));
jPanel.add(new JButton("4"));
jPanel.add(new JButton("5"));
jPanel.add(new JButton("6"));
jPanel.add(new JButton("*"));
jPanel.add(new JButton("1"));
jPanel.add(new JButton("2"));
jPanel.add(new JButton("3"));
jPanel.add(new JButton("-"));
jPanel.add(new JButton("0"));
jPanel.add(new JButton("."));
jPanel.add(new JButton("="));
jPanel.add(new JButton("+"));
jPanel.setBorder(new EmptyBorder(5,5,5,5));
//創建面板存放文本域組件
JPanel jPanel1 = new JPanel();
jPanel1.add(jTextField);
//設置容器佈局爲邊框佈局
container.setLayout(new BorderLayout());
container.add(jPanel1,BorderLayout.NORTH);
container.add(jPanel);
//設置窗體大小,可見,關閉方式
jFrame.setVisible(true);
jFrame.setSize(300,200);
jFrame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
}
}
Demo01運行結果如下