I have two Array i want add two array into One.But How..?

Question

If I have two arrays.

int[] one; int[] two;

And I want to add both the arrays into a single array in easiest way that means
` int[] combine=// what can I do here?

Possible duplication of: http://stackoverflow.com/questions/80476/how-to-concatenate-two-arrays-in-java — Dennis, Nov 16 '11 at 09:52
Please go thru this link http://stackoverflow.com/questions/80476/how-to-concatenate-two-arrays-in-java — Selvakumar Ponnusamy, Nov 16 '11 at 09:54

score 3 · Answer 1 · answered Dec 03 '12 at 08:00

int [][] A={{1,2,4},{2,4,5},{2,4,4}};   
int [][] B={{3,5,4},{0,1,9},{6,1,3}};   
int i,j;
int [][] C=new int[3][3];
int X=A.length;
for(i=0; i<X; i++)
{for(j=0; i<X; i++)
    {
    C[i][j]=A[i][j]+B[i][j];
       }
}
for(i=0; i<X; i++)
{
    for(j=0; j<X; j++){
        System.out.print(C[i][j]+"   ");
    }
    System.out.println();

    }

Nathan Q · Answer 2 · 2011-11-16T10:38:26.533

2

Use of ArrayUtils from Apache Commons Lang library:

int[] combine = ArrayUtils.addAll(one, two);

http://commons.apache.org/lang/api-2.5/org/apache/commons/lang/ArrayUtils.html#addAll(int[], int[])

edited Nov 16 '11 at 10:38

answered Nov 16 '11 at 09:53

Nathan Q

1,842
17
39

score 2 · Answer 3 · edited Jun 20 '20 at 09:12

2

Use ArrayUtils class Method addAll which Adds all the elements of the given arrays into a new array.The new array contains all of the element of array1 followed by all of the elements array2. When an array is returned, it is always a new array.

ArrayUtils.addAll(array1,array2);

Returns: The new int[] array

edited Jun 20 '20 at 09:12

Community

1
1

answered Nov 16 '11 at 10:07

score 1 · Answer 4 · edited Oct 06 '13 at 14:30

1

Try this:

int [][] A={{1,2,4},{2,4,5},{2,4,4}};   
int [][] B={{3,5,4},{0,1,9},{6,1,3}};   
int i,j;
int [][] C=new int[3][3];
int X=A.length;
int y=B.length;
for(i=0; i<X; i++)
{
    for(j=0; i<Y; i++)
    {
        C[i][j]=A[i][j]+B[i][j];
    }
}
for(i=0; i<X; i++)
{
    for(j=0; j<X; j++)
    {
        System.out.print(C[i][j]+"   ");
    }
    System.out.println();
}

edited Oct 06 '13 at 14:30

Patrick Kostjens

4,925
6
27
45

answered Oct 06 '13 at 14:06

HAYAH

11
1

score 1 · Answer 5 · answered Nov 16 '11 at 09:54

int[] one = new int[]{1, 2, 3, 4, 5};
int[] two = new int[]{3, 7, 8, 9};
int[] result = new int[one.length + two.length];
System.arraycopy(one, 0, result, 0, one.length);
System.arraycopy(two, 0, result, one.length, two.length);
System.out.println("Arrays.toString(result) = " + Arrays.toString(result));

score 1 · Accepted Answer · answered Nov 16 '11 at 09:56

1

this is one option to do this...

 int[] combine= new T[one.length+two.length];  
 System.arraycopy(one, 0, combine, 0, one.length); 
 System.arraycopy(two, 0, combine, one.length, two.length);

answered Nov 16 '11 at 09:56

Sumit Singh

24,095
8
74
100

score 0 · Answer 7 · answered Nov 16 '11 at 09:53

0

try this:

int size1 = one.length;
int size2 = two.length;
int[] three = new int[size1 + size2];

for(int i = 0; i < one.length; i++)
     three[i] = one[i];

for(int i = two.length; i < one.length + two.length; i++)
     three[i] = one[i];

answered Nov 16 '11 at 09:53

Thomas Uhrig

29,419
12
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score 0 · Answer 8 · answered Nov 16 '11 at 09:55

int[] combined = new int[one.length()+two.length()];
for(int i=0; i<one.length(); ++i){
combined[i] = one[i];}

for(int i=one.length(); i<combined.length(); ++i){
 combined[i] = two[i-one.length()];
}

Code not tested. Note that you could make some optimizations by unwrapping the length() methods.

score -1 · Answer 9 · answered Nov 16 '11 at 09:56

-1

int[] combinedArrays = new int[one.length + two.length];
int index = 0;
for (int i : one) {
    combinedArarys[index] = one[i];
    index++;
}

for (int i : two) {
    two[index] = two[i];
    index++;
}

answered Nov 16 '11 at 09:56

LuckyLuke

45,605
80
262
423

I have two Array i want add two array into One.But How..?

9 Answers9