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Java Exercises: Check whether a security manager has already been established for the current application or not

Java Basic: Exercise-89 with Solution

Write a Java program to check whether a security manager has already been established for the current application or not.

Sample Solution:

Java Code:

import java.lang.*;
 public class Exercise89 {
 public static void main(String[] args)
 {
	System.out.println("System security interface:");
    System.out.println(System.getSecurityManager());	 
  }
}

Sample Output: 

System security interface:                                             
null

Flowchart:

Flowchart: Java exercises: Check whether a security manager has already been established for the current application or not

Java Code Editor:

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Java: Tips of the Day

countOccurrences

Counts the occurrences of a value in an array.

Use Arrays.stream().filter().count() to count total number of values that equals the specified value.

public static long countOccurrences(int[] numbers, int value) {
    return Arrays.stream(numbers)
            .filter(number -> number == value)
            .count();
}

Ref: https://bit.ly/3kCAgLb