Java Basic(50)-Graphical User Interface GUI

import javax.swing.JOptionPane; →滙入使用JOptionPane

class apples{

public static void main(String[] args){

String fn = JOptionPane.showInputDialog("Enter first number");

String sn = JOptionPane.showInputDialog("Enter second number");

int num1 = Integer.parseInt(fn); →改變字符串到整數

int num2 = Integer.parseInt(sn); →改變字符串到整數

int sum = num1 + num2;

JOptionPane.showMessageDialog(null, "The answer is " +sum, "the title", JOptionPane.PLAIN_MESSAGE);

}

}

這是運行時的結果：