public class TextCalculator01 {
    public static void main(String[] args) {
         new MyCalculator();
    }
}
//計算器類
class MyCalculator extends Frame{
    public MyCalculator() {
        //三個文本框
        TextField num1 = new TextField(10);
        TextField num2 = new TextField(10);
        TextField num3 = new TextField(20);
        //一個等號
        Button button = new Button("=");
        //實現(xiàn)鍵盤事件監(jiān)聽
        button.addActionListener(new MyCalculatorListener(num1,num2,num3));
        //一個標簽
        Label label = new Label("+");
        //布局
        setLayout(new FlowLayout());//流式布局
        add(num1);
        add(label);
        add(num2);
        add(button);
        add(num3);
        setVisible(true);
        pack();

    }
}
//監(jiān)聽器類
class MyCalculatorListener implements ActionListener{
    //獲得三個數(shù)據(jù)
    private TextField num1,num2,num3;
    public MyCalculatorListener(TextField num1,TextField num2,TextField num3) {
        this.num1= num1;
        this.num2 = num2;
        this.num3 = num3;
    }
  @Override
    public void actionPerformed(ActionEvent e) {
        //獲得兩個加數(shù)
        int n1 = Integer.parseInt(num1.getText());//轉(zhuǎn)換成int類型
        int n2 = Integer.parseInt(num2.getText());
        //前面兩個數(shù)相加，放入第三個框中
        num3.setText(""+(n1 + n2));
        //清除前兩個框的的內(nèi)容
        num1.setText("");
        num2.setText("");
     }
}