根据代码画类图该怎么画呀

Question

这个代码的类图该怎么去花啊

 
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
 
import javax.swing.*;
 
import javax.swing.JFrame;
 
public class BaseFrame extends JFrame {
 
    public BaseFrame(String title) {
        setLayout(null);
        setTitle(title);
        setSize(800, 300);
        this.addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });// 关闭窗口的匿名类
        setDefaultCloseOperation(DO_NOTHING_ON_CLOSE);
 
    }
    public void showMe() {
        setVisible(true);
    }
    public static void main(String[] args) {
        JPanel j = new JPanel();
        BaseFrame f = new BaseFrame("hello");
        j.setSize(800, 50);
        j.setLayout(new GridLayout(1, 5, 5, 55));
        final JTextField t1 = new JTextField();
        final JTextField t2 = new JTextField();
        final JTextField t3 = new JTextField();
        final JComboBox cb = new JComboBox();
        cb.addItem("+");
        cb.addItem("-");
        cb.addItem("*");
        cb.addItem("/");
        JButton btn = new JButton("=");
        j.add(t1);
        j.add(cb);
        j.add(t2);
        j.add(btn);
        j.add(t3);
        j.setVisible(true);
        f.add(j);
        f.showMe();
        // final String s = cb.getSelectedItem().toString(); 说明 不能首先或、获得cb 的值因为
        // 代码的执行从上到下 永远只能获取 到第一个item “+” 而 后面的事件记录无法实现
        btn.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
 
                if (cb.getSelectedItem().toString().equals("+")) {
                    int c = 0;
                    int num1 = Integer.parseInt(t1.getText());
                    int num2 = Integer.parseInt(t2.getText());
                    c = num1 + num2;
                    String s1 = Integer.toString(c);
                    t3.setText(s1);
                } else if (cb.getSelectedItem().toString().equals("-")) {
                    int c = 0;
                    int num1 = Integer.parseInt(t1.getText());
                    int num2 = Integer.parseInt(t2.getText());
                    c = num1 - num2;
                    String s1 = Integer.toString(c);
                    t3.setText(s1);
 
                } else if (cb.getSelectedItem().toString().equals("*")) {
                    int c = 0;
                    int num1 = Integer.parseInt(t1.getText());
                    int num2 = Integer.parseInt(t2.getText());
                    c = num1 * num2;
                    String s1 = Integer.toString(c);
                    t3.setText(s1);
 
                } else if (cb.getSelectedItem().toString().equals("/")) {
                    int c = 0;
                    int num1 = Integer.parseInt(t1.getText());
                    int num2 = Integer.parseInt(t2.getText());
                    c = num1 / num2;
                    String s1 = Integer.toString(c);
                    t3.setText(s1);
 
                } else {
                    System.out.print("No");
                }
            }
        });
    }
}
 

Answer 1

IDEA 在线根据代码生成类图的方式，可以试一下哦！