Object-Oriented Programming (Java) Experiment 8

The purpose and content of the experiment

1. Purpose of the experiment

1. Master the generation and use of controls under the Swing graphical user interface.
2. Master the layout design of the Java window.

2. Experimental content
Implement the following programs on the computer and observe the running conditions of the programs:

1. Use a JDialog dialog box to display a greeting.
2. Use the radio button group to carry out the aspiration selection process, and only one can be selected at a time.

experiment procedure

greeting program

package test8;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class jdialog {
    
    
    public static void main(String[] args)throws Exception {
    
    
        //编写主窗口
        JButton but1 = new JButton("确定");
        JFrame f = new JFrame("显示问候语实验");
        f.setLayout(null);
        f.setTitle("问候程序");
        f.setSize(600, 150);
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        JLabel txt = new JLabel("请输入你的名字");
        txt.setLocation(100,10);
        txt.setSize(100,30);
        f.add(txt);

        JTextField input1 = new JTextField(1);
        input1.setSize(200, 30);
        input1.setLocation(200, 10);

        f.add(input1);

        but1.setSize(60,30);
        but1.setLocation(200,50);
        f.add(but1);

        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//设置默认关闭按钮
        f.setVisible(true);

        //添加点击事件
        but1.addActionListener(new ActionListener(){
    
    
                @Override
                public void actionPerformed(ActionEvent ae) {
    
    
                    String name = input1.getText().trim();
                    JDialog d1 = new JDialog();
                    d1.setSize(200, 100);
                    JTextField txt2 = new JTextField(name + "，你好！", 1);
                    txt2.setEditable(false);
                    d1.add(txt2);
                    d1.show();

                }


        });

    }
}

The size and position can be changed by yourself, no adjustment will be made here

radio program

package test8;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class danxuan {
    
    
    public static void main(String[] args)throws Exception {
    
    
        //编写主窗口
        JFrame f = new JFrame("单选实验");
        f.setLayout(null);
        f.setTitle("单选程序");
        f.setSize(300, 150);
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        JLabel txt = new JLabel("将来要当");
        txt.setLocation(10,10);
        txt.setSize(100,30);
        f.add(txt);

        JRadioButton choose1=new JRadioButton("教师",false);
        JRadioButton choose2=new JRadioButton("工程师",false);
        JRadioButton choose3=new JRadioButton("程序员",false);
        choose1.setLocation(70, 10);
        choose1.setSize(60, 30);
        choose2.setLocation(140, 10);
        choose2.setSize(80, 30);
        choose3.setLocation(220, 10);
        choose3.setSize(70, 30);


        f.add(choose1);
        f.add(choose2);
        f.add(choose3);

        JLabel out = new JLabel("你选择了将来要当：");
        out.setSize(200,50);
        out.setLocation(50,50);
        f.add(out);

        choose1.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent e) {
    
    
                if(choose1.isSelected()){
    
    
                    out.setText("你选择了将来要当：教师");
                }
            }
        });
        choose2.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent e) {
    
    
                if(choose2.isSelected()){
    
    
                    out.setText("你选择了将来要当：工程师");
                }
            }
        });
        choose3.addActionListener(new ActionListener() {
    
    
            @Override
            public void actionPerformed(ActionEvent e) {
    
    
                if(choose3.isSelected()){
    
    
                    out.setText("你选择了将来要当：程序员");
                }
            }
        });
        f.setVisible(true);
    }
}