Java ThreadLocalRandom nextInt() method

The nextInt() method of Java ThreadLocalRandom class returns a pseudorandom int value. This method overrides the nextInt in class Random.

Syntax:

Parameter:

Returns:

This method returns a pseudorandom int value.

Example 1

  import java.util.concurrent.ThreadLocalRandom;    public class ThreadLocalRandomNextIntExample1 {      public static void main(String[] args) {            // Returns a pseudorandom int value          System.out.println(“Random int value is: ” +ThreadLocalRandom.current().nextInt());      }  }  

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Output:

Random int value is: -2035038202

Java ThreadLocalRandom nextInt(int bound) method

The nextInt(int bound) method of Java ThreadLocalRandom class returns a pseudorandom int value between zero and the specified bound. This method overrides the nextInt in class Random.

Syntax:

Parameter:

bound: It is the upper bound. It must be positive.

Returns:

This method returns a pseudorandom int value between zero and the specified bound.

Exception:

IllegalArgumentException: This exception will throw if bound is not positive

Example 1

  import java.util.concurrent.ThreadLocalRandom;    public class ThreadLocalRandomNextIntExample2 {      public static void main(String[] args) {            // Returns a pseudorandom, uniformly distributed integer value between 0 and 4000          System.out.println(“Random int value is: ” +ThreadLocalRandom.current().nextInt(4000));      }  }  

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Output:

Random int value is: 1566

Example 2

  import java.util.concurrent.ThreadLocalRandom;    public class ThreadLocalRandomNextIntExample3 {      public static void main(String[] args) {            // Returns a pseudorandom, uniformly distributed integer value between 0 and 38000          System.out.println(“Random int value is: ” +ThreadLocalRandom.current().nextInt(38000));      }  }  

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Output:

Random int value is: 25266

Example 3

  import java.util.concurrent.ThreadLocalRandom;    public class ThreadLocalRandomNextIntExample4 {      public static void main(String[] args) {            // Returns exception because the bound is negative        System.out.println(“Random int value is: ” +ThreadLocalRandom.current().nextInt(-100));      }  }  

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Output:

Exception in thread "main" java.lang.IllegalArgumentException: bound must be positive  at java.base/java.util.concurrent.ThreadLocalRandom.nextInt(Unknown Source)  at tests.JavaNextIntExample3.main(ThreadLocalRandomNextIntExample3.java:7)

Java ThreadLocalRandom nextInt(int least, int bound) method

The nextInt(int least, int bound) method of Java ThreadLocalRandom class returns a pseudorandom. It returns the uniformly distributed value between the given least value and bound.

Syntax:

Parameter:

least – It is the least value.

bound – It is the upper bound (exclusive).

Returns:

This method returns the next value.

Exception:

IllegalArgumentException – This exception will throw if the least is greater than or equal to bound.

Example 1

  import java.util.concurrent.ThreadLocalRandom;    public class ThreadLocalRandomNextIntExample5 {      public static void main(String[] args) {            // Returns a pseudorandom, uniformly distributed integer value between 10 and 20          System.out.println(“Random int value is: ” + ThreadLocalRandom.current().nextInt(10, 20));      }  }  

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Output:

Random int value is: 11

Example 2

  import java.util.concurrent.ThreadLocalRandom;    public class ThreadLocalRandomNextIntExample6 {      public static void main(String[] args) {            // Returns exception because least is greater than bound      System.out.println(“Random int value is: ” +ThreadLocalRandom.current().nextInt(30, 10));      }  }  

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Output:

Exception in thread "main" java.lang.IllegalArgumentException: bound must be greater than origin  at java.base/java.util.concurrent.ThreadLocalRandom.nextInt(Unknown Source)  at tests.JavaNextIntExample2.main(ThreadLocalRandomNextIntExample2.java:7)

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Java ThreadLocalRandom nextInt() Method with Examples

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Syntax:

Parameter:

Returns:

Example 1

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Parameter:

Returns:

Exception:

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Parameter:

Returns:

Exception:

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