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  • Java学习——加法器

    package cys;
    import java.awt.event.ActionEvent;
    import java.awt.event.ActionListener;
    import java.awt.*;
    import javax.swing.*;
    
    public class AddOperator {
    
        public static void main(String[] args) {
            // TODO Auto-generated method stub
            WindowButton win = new WindowButton("加法器");
        }
    
    }
    
    class WindowButton extends JFrame implements ActionListener{
        int num1,num2;
        JLabel answer,tishi,jiahao;
        JTextField txt1,txt2;
        JButton buttonSure;
        
        WindowButton(String s){
            Container con = getContentPane();
            con.setLayout(new FlowLayout());
            buttonSure = new JButton("确定");
            txt1 = new JTextField("0",10);
            txt2 = new JTextField("0",10);
            answer = new JLabel("0",JLabel.CENTER);
            answer.setSize(20,20);
            tishi = new JLabel("请输入你想要加的两个数",JLabel.CENTER);
            jiahao = new JLabel("+",JLabel.CENTER);
            con.add(tishi);
            con.add(txt1);
            con.add(jiahao);
            con.add(txt2);
            con.add(answer);
            con.add(buttonSure);
            buttonSure.addActionListener(this);
            setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            this.setSize(600,150);
            this.setVisible(true);
            validate();    
        }
        public void actionPerformed(ActionEvent e){
            
            if(e.getSource()==buttonSure){
                num1=Integer.parseInt(txt1.getText());
                num2=Integer.parseInt(txt2.getText());
                answer.setText(num1+num2+"");
                
            }
            
        }
    }

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  • 原文地址:https://www.cnblogs.com/caiyishuai/p/10132832.html
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