public class Test {

  public static void main(String[] args) {

     int a = 10;

     int b = 20;

     int c = 25;

     int d = 25;

     System.out.println("a + b = " + (a + b) );

     System.out.println("a - b = " + (a - b) );

     System.out.println("a * b = " + (a * b) );

     System.out.println("b / a = " + (b / a) );

     System.out.println("b % a = " + (b % a) );

     System.out.println("c % a = " + (c % a) );

     System.out.println("a++   = " +  (a++) );

     System.out.println("a--   = " +  (a--) );

     // 查看  d++ 与 ++d 的不同

     System.out.println("d++   = " +  (d++) );

     System.out.println("++d   = " +  (++d) );

  }

}

public class selfAddMinus{

    public static void main(String[] args){

        int a = 3;//定义一个变量；

        int b = ++a;//自增运算

        int c = 3;

        int d = --c;//自减运算

        System.out.println("进行自增运算后的值等于"+b);

        System.out.println("进行自减运算后的值等于"+d);

    }

}

public class selfAddMinus{

    public static void main(String[] args){

        int a = 5;//定义一个变量；

        int b = 5;

        int x = 2*++a;

        int y = 2*b++;

        System.out.println("自增运算符前缀运算后a="+a+",x="+x);

        System.out.println("自增运算符后缀运算后b="+b+",y="+y);

    }

}

public class Test {

  public static void main(String[] args) {

     int a = 10;

     int b = 20;

     System.out.println("a == b = " + (a == b) );

     System.out.println("a != b = " + (a != b) );

     System.out.println("a > b = " + (a > b) );

     System.out.println("a < b = " + (a < b) );

     System.out.println("b >= a = " + (b >= a) );

     System.out.println("b <= a = " + (b <= a) );

  }

}

public class Test {

  public static void main(String[] args) {

     int a = 60; /* 60 = 0011 1100 */

     int b = 13; /* 13 = 0000 1101 */

     int c = 0;

     c = a & b;       /* 12 = 0000 1100 */

     System.out.println("a & b = " + c );

     c = a | b;       /* 61 = 0011 1101 */

     System.out.println("a | b = " + c );

     c = a ^ b;       /* 49 = 0011 0001 */

     System.out.println("a ^ b = " + c );

     c = ~a;          /*-61 = 1100 0011 */

     System.out.println("~a = " + c );

     c = a << 2;     /* 240 = 1111 0000 */

     System.out.println("a << 2 = " + c );

     c = a >> 2;     /* 15 = 1111 */

     System.out.println("a >> 2  = " + c );

     c = a >>> 2;     /* 15 = 0000 1111 */

     System.out.println("a >>> 2 = " + c );

  }

} 

public class Test {

  public static void main(String[] args) {

     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 LuoJi{

    public static void main(String[] args){

        int a = 5;//定义一个变量；

        boolean b = (a<4)&&(a++<10);

        System.out.println("使用短路逻辑运算符的结果为"+b);

        System.out.println("a的结果为"+a);

    }

}

public class Test {

    public static void main(String[] args) {

        int a = 10;

        int b = 20;

        int c = 0;

        c = a + b;

        System.out.println("c = a + b = " + c );

        c += a ;

        System.out.println("c += a  = " + c );

        c -= a ;

        System.out.println("c -= a = " + c );

        c *= a ;

        System.out.println("c *= a = " + c );

        a = 10;

        c = 15;

        c /= a ;

        System.out.println("c /= a = " + c );

        a = 10;

        c = 15;

        c %= a ;

        System.out.println("c %= a  = " + c );

        c <<= 2 ;

        System.out.println("c <<= 2 = " + c );

        c >>= 2 ;

        System.out.println("c >>= 2 = " + c );

        c >>= 2 ;

        System.out.println("c >>= 2 = " + c );

        c &= a ;

        System.out.println("c &= a  = " + c );

        c ^= a ;

        System.out.println("c ^= a   = " + c );

        c |= a ;

        System.out.println("c |= a   = " + c );

    }

}

public class Test {

   public static void main(String[] args){

      int a , b;

      a = 10;

      // 如果 a 等于 1 成立，则设置 b 为 20，否则为 30

      b = (a == 1) ? 20 : 30;

      System.out.println( "Value of b is : " +  b );

      // 如果 a 等于 10 成立，则设置 b 为 20，否则为 30

      b = (a == 10) ? 20 : 30;

      System.out.println( "Value of b is : " + b );

   }

}