java.lang.NegativeArraySizeException while cloning in java

In this Example we are going to understanding the clone in Java and its exceptons..

Error Message :

Exception in thread "main" java.lang.NegativeArraySizeException: -5

       at com.si.cloneSample.<init>(cloneSample.java:9)

       at com.si.cloneSample.main(cloneSample.java:17)

Error Description :

package com.si;

public class cloneSample implements Cloneable {

      

       int number;

       Integer[] intArray;

       cloneSample(int num){

              number  = num;

              intArray= new Integer[number];

             

       }

       public Object clone() throws CloneNotSupportedException {

              return super.clone();

       }

       public static void main(String[] args) {

              cloneSample samp1 = new cloneSample(-5);

              System.out.println(samp1.intArray[0]);

       }

}

In the above example ,the red background color line is giving the exception.

Due to negative number we are getting this error

Solution:

To avoid this exception we can do the positive number check if we don't know the exact value or we should make sure we are giving positive numbers.

package com.si;

public class cloneSample implements Cloneable {

      

       int number;

       Integer[] intArray;

       cloneSample(int num){

              number  = num;

              intArray= new Integer[number];

             

       }

       public Object clone() throws CloneNotSupportedException {

              return super.clone();

       }

       public static void main(String[] args) {

              cloneSample samp1 = new cloneSample(5);

              samp1.intArray[0]= 1;

              System.out.println(samp1.intArray[0]);

       }

}

                         

Output:

1