CODEWITHSUNDEEP
javaarrays
Predict_it
Predict_it

Reputation: 233

i want to copy from big arr to two small ones

I want to input my own vallues to big array of 20 and copy that to 2 small ones of 10, then value of second array must be outprinted. Im getting error ArrayIndexOutOfBoundsException what is wrong with my code. =|

 Scanner in = new Scanner(System.in);
        int[] test = new int[20];
        int[] testA = new int[10];
        int[] testB = new int[10];
        for (int i = 0; i < test.length; i++){
            test[i] = in.nextInt();
        }
        for(int i = 0; i < 10; i++){
            testA[i]= test[i];
        }
        for (int i = 10; i < test.length; i++ ){
            testB[i] = test[i];
            System.out.println(testB[i]);

Upvotes: 0

Views: 53

Answers (2)

herohuyongtao
herohuyongtao

Reputation: 50667

In the first step of the second loop, you will assign value to testB[10], which causes the error because testB only have size of 10 (i.e. [0~9]).

You need to change

testB[i] = test[i];
System.out.println(testB[i]);

to

testB[i-10] = test[i];
System.out.println(testB[i-10]);

Or you can use:

for (int i = 0; i < 10; i++ ){
    testB[i] = test[i+10];
    System.out.println(testB[i]);
}

Upvotes: 1

Ken
Ken

Reputation: 654

Alternativley:

System.arraycopy( test , 0, testA , 0, 10 );
System.arraycopy( test , 10, testB , 0, 10 );

Upvotes: 1

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