Java - Integer rotateLeft() method



Description

The Java Integer rotateLeft() method returns the value obtained by rotating the two's complement binary representation of the specified int value i left by the specified number of bits. (Bits shifted out of the left hand, or high-order, side reenter on the right, or low-order.).

Declaration

Following is the declaration for java.lang.Integer.rotateLeft() method

public static int rotateLeft(int i, int distance)

Parameters

  • i − This is the int value.

  • distance − This is the rotation distance.

Return Value

This method returns the value obtained by rotating the two's complement binary representation of the specified int value left by the specified number of bits.

Exception

NA

Example 1

The following example shows the usage of Integer rotateLeft() method to get an int by rotating the two's complement binary representation of the specified int value i left by the specified number of bits. We've created a int variable and assigned it a positive int value. Then using rotateLeft() method within a for loop, we're printing new integers generated.

package com.tutorialspoint;
public class IntegerDemo {
   public static void main(String[] args) {
      int n = 2;

      // returns the value obtained by rotating left
      for(int i = 0; i < 4; i++) {
         n = Integer.rotateLeft(n, 4);
         System.out.println(n);
      }
   }
} 

Output

Let us compile and run the above program, this will produce the following result −

32
512
8192
131072

Example 2

The following example shows the usage of Integer rotateLeft() method to get an int by rotating the two's complement binary representation of the specified int value i left by the specified number of bits. We've created a int variable and assigned it a negative int value. Then using rotateLeft() method within a for loop, we're printing new integers generated.

package com.tutorialspoint;
public class IntegerDemo {
   public static void main(String[] args) {
      int n = -2;

      // returns the value obtained by rotating left
      for(int i = 0; i < 4; i++) {
         n = Integer.rotateLeft(n, 4);
         System.out.println(n);
      }
   }
} 

Output

Let us compile and run the above program, this will produce the following result −

-17
-257
-4097
-65537

Example 3

The following example shows the usage of Integer rotateLeft() method to get an int by rotating the two's complement binary representation of the specified int value i left by the specified number of bits. We've created a int variable and assigned it a zero value. Then using rotateLeft() method within a for loop, we're printing new integers generated.

package com.tutorialspoint;
public class IntegerDemo {
   public static void main(String[] args) {
      int n = 0;

      // returns the value obtained by rotating left
      for(int i = 0; i < 4; i++) {
         n = Integer.rotateLeft(n, 4);
         System.out.println(n);
      }
   }
} 

Output

Let us compile and run the above program, this will produce the following result −

0
0
0
0
java_lang_integer.htm
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