Question

当这个程序运行时，它默认显示默认输出，当我点击活动按钮时，没有任何显示。请帮我解决这个问题。

我想开发一个可以像这个应用程序一样工作的应用程序。这是一个演示应用程序，但我无法解决此问题。

演示应用程序：

    import javax.swing.JRadioButton;
    import javax.swing.ButtonGroup;
    import java.awt.event.*;
    import javax.swing.JFrame;
    import javax.swing.JPanel;
    import java.awt.FlowLayout;
    import java.awt.BorderLayout;
    import java.awt.Color;
    import java.awt.Cursor;
    public class GraphicRadioButton extends JFrame{

        public  static JRadioButton active ,deactive;
        private ButtonGroup rdoBtn;
        private JFrame frame;
        private JPanel panel;
        public GraphicRadioButton()
        {
            super("Testing");
            active = new  JRadioButton("Active");
            deactive = new  JRadioButton("Deactive ", true);
            frame = new JFrame();
            this.setLocationRelativeTo(null);

            this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

            panel = new JPanel();
            panel.setLayout(new FlowLayout());
            rdoBtn = new ButtonGroup();
            rdoBtn.add(active);
            rdoBtn.add(deactive);

            panel.add(active);
            panel.add(deactive);
            this.add(panel,BorderLayout.CENTER);
            this.setResizable(false);
            Cursor c = new Cursor(Cursor.HAND_CURSOR);
            this.setCursor(c); 
            pack();
        }
    }



    import javax.swing.*;
    public class Main {

        public static void main(String ar[]){
            GraphicRadioButton g = new GraphicRadioButton();
            g.setVisible(true);
            boolean test = true;
            boolean ch = true;

            do{
                 if(GraphicRadioButton.active.isSelected()&&!test){

                        System.out.println("active");
                        test = true;
                        ch = true;
                  }

                 if(GraphicRadioButton.deactive.isSelected()  &&ch ){

                        System.out.println("deactive");
                        test = false;
                        ch = false;
                    }

            }while(true);

        }//end main method
    }//end Main class

Answer 1

更改此行

if (GraphicRadioButton.active.isSelected() && !test) {

到

if (GraphicRadioButton.active.isSelected() && test) {

您需要将!test更改为test。

Answer 2

我已使用以下代码进行测试，并且工作正常：

package ljm.aplication;

import java.awt.BorderLayout;
import java.awt.Cursor;
import java.awt.FlowLayout;

import javax.swing.ButtonGroup;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JRadioButton;

public class GraphicRadioButton extends JFrame {

    public static void main(String ar[]) {
        GraphicRadioButton g = new GraphicRadioButton();
        g.setVisible(true);
        boolean test = true;
        boolean ch = true;

        do {
            if (GraphicRadioButton.active.isSelected() && !test) {

                System.out.println("active");
                test = true;
                ch = true;
            }

            if (GraphicRadioButton.deactive.isSelected() && ch) {

                System.out.println("deactive");
                test = false;
                ch = false;
            }

        }
        while (true);

    }// end main method

    private static final long serialVersionUID = -3366748875509458022L;
    public static JRadioButton active, deactive;
    private ButtonGroup rdoBtn;
    private JFrame frame;
    private JPanel panel;

    public GraphicRadioButton() {
        super("Testing");
        active = new JRadioButton("Active");
        deactive = new JRadioButton("Deactive ", true);
        frame = new JFrame();
        this.setLocationRelativeTo(null);

        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        panel = new JPanel();
        panel.setLayout(new FlowLayout());
        rdoBtn = new ButtonGroup();
        rdoBtn.add(active);
        rdoBtn.add(deactive);

        panel.add(active);
        panel.add(deactive);
        this.add(panel, BorderLayout.CENTER);
        this.setResizable(false);
        Cursor c = new Cursor(Cursor.HAND_CURSOR);
        this.setCursor(c);
        pack();
    }
}

当我点击单选按钮时它没有显示我想要的输出？

2 个答案: