How can we check underflow in Java?

Underflow occurs when the value assigned to a variable is less than the minimum allowed value of the variable. If an underflow occurs in Java, the JVM does not throw an exception and it is the programmer's responsibility to handle the underflow situation.

Example

public class UnderlowTest {
   public static void main(String[] args) {
      int num1 = -2147483648;
      int num2 = -1;
      System.out.println("Number 1: " + num1);
      System.out.println("Number 2: " + num2);
      long sum = (long)num1 + (long)num2;
      if(sum < Integer.MIN_VALUE) {
         throw<strong> </strong>new ArithmeticException("Underflow occurred!");
      }
      System.out.println("The sum of two numbers : " + (int)sum);
   }
}

Output

Number 1: -2147483648
Number 2: -1
Exception in thread "main" java.lang.ArithmeticException: Underflow occurred!
        at UnderlowTest.main(UnderlowTest.java:9)

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