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Create a new array big enough to hold both, then use System.arraycopy() to copy two arrays into new concatentated array.

// two arrays to be concatenated

Object[] a = getArrayA();
Object[] b = getArrayB();

// create new array

Object[] concatenated = new Object[a.length + b.length];

// Copy contents of a

System.arraycopy(a, 0, concatenated, 0, a.length);

// Copy contents of b (after a)

System.arraycopy(b, 0, concatenated, a.length, b.length); 

written by objects \\ tags: array