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JAVA基本运算符与强制类型提升转换------JAVA入门基础教程

article 2025/2/23 6:22:16

import java.util.Scanner;

class out
{
   public static void main(String args[])
   {
       int i = 5;
       long l = 10;//自动类型提升
       byte b = (byte)i;//强制类型转换
       int a1 = 10;
       int b1 = 10;
       int a2;
       int b2;
       a2 = b2 = 10;
       System.out.println(a2+"+"+b2);
       int a3 = 10,b3 = 20;
       System.out.println(a3+"+"+b3);
       int m1 = 10;
       m1 += 5;
       System.out.println(m1);
       Scanner in = new Scanner(System.in);
       int num1 = 3;
       int num2 = 4;
       int num3 = 5;
       if(num1 < num2)
       {
           if(num2 < num3)
           {
               System.out.println(num3);
           }
           else
           {
               System.out.println(num2);
           }
       }
       else
       {
           System.out.println(num1);
       }
       for (i = 0;i < 5;i++)
       {
           System.out.println("Hello world");
       }