Java ThreadLocalRandom ints() method

The ints() method of Java ThreadLocalRandom class returns an effectively unlimited stream of pseudorandom int values. This method overrides ints in class Random.

Syntax:

Parameter:

Returns:

This method returns a stream of pseudorandom int values.

Example 1

import java.util.concurrent.ThreadLocalRandom;

public class ThreadLocalRandomIntsExample1 {
    public static void main(String[] args) {
    	
    	// Returns a stream of pseudorandom int values   	
    	System.out.println("stream of pseudorandom int value is: " +ThreadLocalRandom.current().ints());
    }
}

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Output:

stream of pseudorandom int value is: java.util.stream.IntPipeline$Head@136432db

Java ThreadLocalRandom ints(long streamSize) method

The ints(long streamSize) method of Java ThreadLocalRandom class returns a stream producing the given streamSize number of pseudorandom int values. This method overrides ints in class Random.

Syntax:

Parameter:

streamSize - It is the number of values to generate

Returns:

This method returns a stream of int values.

Exception:

IllegalArgumentException: This exception will throw if streamSize is less than zero.

Example 1

import java.util.concurrent.ThreadLocalRandom;

public class ThreadLocalRandomIntsExample4 {
    public static void main(String[] args) {
    	
    	// Returns a stream of int values   	
    	System.out.println("stream of int value is: " +ThreadLocalRandom.current().ints(3899));
    }
}

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Output:

stream of int value is: java.util.stream.IntPipeline$Head@7382f612

Example 2

import java.util.concurrent.ThreadLocalRandom;

public class ThreadLocalRandomIntsExample5 {
    public static void main(String[] args) {
    	
    	// Returns exception because streamSize is negative 
    	System.out.println("stream of int value is: " +ThreadLocalRandom.current().ints(-20));
    }
}

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Output:

Exception in thread "main" java.lang.IllegalArgumentException: size must be non-negative
	at java.base/java.util.concurrent.ThreadLocalRandom.ints(Unknown Source)
	at tests.ThreadLocalRandomIntsExample2.main(ThreadLocalRandomIntsExample2.java:7)

Java ThreadLocalRandom ints(int randomNumberOrigin, int randomNumberBound) method

The ints(int randomNumberOrigin, int randomNumberBound) method of Java ThreadLocalRandom class returns an effectively unlimited stream of pseudorandom int values. Each value must conform to the given origin (inclusive) and bound (exclusive). This method overrides ints in class Random.

Syntax:

Parameter:

randomNumberOrigin: It is the origin (inclusive) of each random value.

randomNumberBound: It is the bound (exclusive) of each random value.

Returns:

This method returns a stream of pseudorandom int values.

Exception:

IllegalArgumentException: This exception will throw if randomNumberOrigin is greater than or equal to randomNumberBound.

Example 1

import java.util.concurrent.ThreadLocalRandom;

public class ThreadLocalRandomIntsExample2 {
    public static void main(String[] args) {
    	
    	// Returns a stream of pseudorandom int values   	
    	System.out.println("stream of pseudorandom int value is: " +ThreadLocalRandom.current().ints(20, 30));
    }
}

Test it Now

Output:

stream of pseudorandom int value is: java.util.stream.IntPipeline$Head@7382f612

Example 2

import java.util.concurrent.ThreadLocalRandom;

public class ThreadLocalRandomIntsExample3 {
    public static void main(String[] args) {
    	
    	// Returns exception because origin is greater than bound  	
    	System.out.println("stream of pseudorandom int value is: " +ThreadLocalRandom.current().ints(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.ints(Unknown Source)
	at tests.ThreadLocalRandomIntsExample2.main(ThreadLocalRandomIntsExample2.java:7)

Java ThreadLocalRandom ints(long streamSize, int randomNumberOrigin, int randomNumberBound) method

The ints(long streamSize, int randomNumberOrigin, int randomNumberBound) method of Java ThreadLocalRandom class returns a stream producing the given streamSize number of pseudorandom int values. Each value must conform to the given origin (inclusive) and bound (exclusive). This method overrides ints in class Random.

Syntax:

public DoubleStream ints(long streamSize, int randomNumberOrigin, int randomNumberBound)

Parameter:

streamSize - It is the number of values to generate

randomNumberOrigin - It is the origin (inclusive) of each random value

randomNumberBound - It is the bound (exclusive) of each random value

Returns:

This method returns a stream of pseudorandom int values.

Exception:

IllegalArgumentException: This exception will throw if streamSize is less than zero.
IllegalArgumentException: This exception will throw if randomNumberOrigin is greater than or equal to randomNumberBound.

Example 1

import java.util.concurrent.ThreadLocalRandom;

public class ThreadLocalRandomIntsExample6 {
    public static void main(String[] args) {
    	
    	// Returns a stream of pseudorandom int values   	
    	System.out.println("stream of pseudorandom int value is: " +ThreadLocalRandom.current().ints(10, 20, 30));
    }
}

Test it Now

Output:

stream of pseudorandom int value is: java.util.stream.IntPipeline$Head@7382f612

Example 2

import java.util.concurrent.ThreadLocalRandom;

public class ThreadLocalRandomIntsExample7 {
    public static void main(String[] args) {
    	
    	// Returns exception because steamSize is negative   	
    	System.out.println("stream of pseudorandom int value is: " +ThreadLocalRandom.current().ints(-10, 20, 30));
    }
}

Test it Now

Output:

Exception in thread "main" java.lang.IllegalArgumentException: size must be non-negative
	at java.base/java.util.concurrent.ThreadLocalRandom.ints(Unknown Source)
	at tests.ThreadLocalRandomIntsExample2.main(ThreadLocalRandomIntsExample2.java:7)

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