實際上java與c的運算符近乎一樣

1.關系運算符

public class laal {
    public static void main(String args[]) {
     if(5>2)
         System.out.println("返回值："+(5>2));
     if(true)
         System.out.println("Hello java!");
     if((3+6)==(3-6))
         System.out.println("I like java!");
    }

}

返回值：true
Hello java
 
!

2.遞增與遞減運算符

public class Test {
    public static void main(String args[]) {
        int a = 3 , b = 3;
        
        System.out.print("a = "+a);
        System.out.println(" ,a++="+(a++)+" ,a="+a);
        System.out.print("b = "+b);
        System.out.println(" ,++b="+(++b)+" ,b="+b);
    }

}
 

a = 3 ,a++=3 ,a=4
b = 3 ,++b=4 ,b=4

3.邏輯運算符

public class logic {
        public static void main(String args[]) {
            int a = 56;       
            if((a<0)||(a>100))
                System.out.println("輸入的數據有錯誤!");
            if((a<60)&&(a>49))
                System.out.println(
 
"準備補考吧！");
       }
}

準備補考吧！

java的運算符