Question

我在java中制作一个“假病毒”。当你运行它时会弹出一个名为“你的计算机有病毒”的窗口，窗口上有一个按钮，上面写着“你的计算机有（1）个病毒。单击此处卸载它们”但是当你点击它时会弹出另一个窗口。但我想让它像每次点击它一样，“病毒”的数量加1。（例如，单击按钮后弹出的第二个窗口显示“您的计算机有（2）个病毒”）。我试图添加它但它没有用。（对不起我可怕的语法）。这是我的代码：

    import java.awt.event.ActionEvent;
    import java.awt.event.ActionListener;

    import javax.swing.JButton;
    import javax.swing.JFrame;
    import javax.swing.JPanel;
    import javax.swing.Timer;


    public class FirstWindow extends JFrame {

    int virusAmount = 1;
    private static final long serialVersionUID = 1L;

    public FirstWindow(){
        super("Your computer has a virus");
        setSize(400, 75);
        setDefaultCloseOperation(EXIT_ON_CLOSE);

        JPanel p = new JPanel();
        JButton b = new JButton("Your computer has (" + virusAmount++ + ") virus(es). Click here to uninstall them.");
        b.addActionListener(new ActionListener() {          

            public void actionPerformed(ActionEvent e) {
                FirstWindow f2 = new FirstWindow();
                f2.setVisible(true);
            }
        });     
        p.add(b);       
        add(p); 
     }  
   }

Answer 1

只需在构造函数中定义：

public FirstWindow(int i){}

完整示例：

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;

public class FirstWindow extends JFrame {
    int virusAmount;
    private static final long serialVersionUID = 1L;
    public FirstWindow(int i) {
        virusAmount = i;
        setSize(400, 75);
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        JPanel p = new JPanel();
        JButton b;
        if(virusAmount == 1){
            b = new JButton("Your computer has a virus");
        }
        else{
            b = new JButton("Your computer has (" + virusAmount + ") virus(es). Click here to uninstall them.");
        }
        b.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                FirstWindow f2 = new FirstWindow(virusAmount+1);
                f2.setVisible(true);
            }
        });
        p.add(b);
        add(p);
    }
}



public class Main {
    public static void main(String[] args) {
        FirstWindow fw = new FirstWindow(1);
        fw.setVisible(true);
    }
}

每次点击添加一个int（java）

1 个答案: