【Java】编写Java程序，完成从键盘输入两个运算数据，计算两数之和并输出结果...

public class MyTest {
    public static void main(String[] args) {
        int a=2;
        int b=6;
        int c=a+b;
        System.out.println("结果为"+c);
    }
}

import java.io.*;
public class MyTest {
    /*两数求和*/
    public static void main(final String[] args) throws IOException {
        System.out.println("请输入一个整数：");
        final byte t[] = new byte[10];
        System.in.read(t);
        final String sl = new String(t);
        final int a = Integer.parseInt(sl.trim());
        System.out.println("请输入一个小数：");
        System.in.read(t);
        final String s2 = new String(t);
        final double b = Double.parseDouble(s2.trim());
        // 处理数据
        final double c = a + b;
        System.out.println("计算结果为："+c);
    }
}

import javax.swing.JOptionPane;
public class MyTest {
    /*两数求和*/
    public static void main(final String[] args) 
    {
        //输入数据
        //图形化输入方案
        String s1=JOptionPane.showInputDialog("请输入一个整数：");
        int a=Integer.parseInt(s1);
        String s2=JOptionPane.showInputDialog("请输入一个小数：");
        double b=Double.parseDouble(s2);
        //处理数据
        double c=a+b;
        //输出结果
        JOptionPane.showMessageDialog(null,"结果为："+a+"+"+b+"="+c);
    }
}