各种不同的运算符

public class qq {
        public static void main(String[] args){
           //Ctrl+D:复制当前行到下一行
         int a=10;
         int b=20;
         int c=25;
         int d=25;
         System.out.println(a+b);
         System.out.println(a-b);
         System.out.println(a*b);
         System.out.println(a/(double)b);
        }
    }

public class qq {
        public static void main(String[] args){
           //Ctrl+D:复制当前行到下一行
        boolean a=true;
        boolean b=false;
        System.out.println("a&&b:"+(a&&b));
        System.out.println("a||b:"+(a||b));
        System.out.println("!(a&&b):"+!(a&&b));
        }
    }

public class qq {
        public static void main(String[] args){
      /*A=0011 1100
      B=0000 1101
      A&B=0000 1100
      A|B=0011 1101
      A^B=0011 0001
      ~B=1111 0010
       */
            //<<   *2
//>>/2
            System.out.println(2<<3);
            System.out.println(2>>1);
            //字符串连接符+放在字符串后面自动连接
            int a=10;
            int b=20;
            System.out.println(""+a+b);
            System.out.println(a+b+"");
        }
    }

public class qq {
        public static void main(String[] args){
      /*A=0011 1100
      B=0000 1101
      A&B=0000 1100
      A|B=0011 1101
      A^B=0011 0001
      ~B=1111 0010
       */
            //<<   *2
//>>/2
            System.out.println(2<<3);
            System.out.println(2>>1);
            //字符串连接符+放在字符串后面自动连接
            int a=10;
            int b=20;
            System.out.println(""+a+b);
            System.out.println(a+b+"");
            //x?y:z
            int score=60;
            String  type=score<60 ?"不及格":"及格";
            System.out.println(type);
            System.out.println(score<60?"不及格":"及格");
        }
    }