Authors:
Stuart Reges, Marty Stepp
Chapter:
Arrays
Exercise:
Exercises
Question:16 | ISBN:9780136091813 | Edition: 2
Question
Write a method called append that accepts two integer arrays as parameters and returns a new array that contains the result of appending the second array’s values at the end of the first array. For example, if arrays list1 and list2
store {2, 4, 6} and {1, 2, 3, 4, 5} respectively, the call of append(list1, list2) should return a new array containing {2, 4, 6, 1, 2, 3, 4, 5}. If the call instead had been append(list2, list1) , the method would return an array containing {1, 2, 3, 4, 5, 2, 4, 6}.
Answer
Implementation of append method:
public static int[] append(int[] a1, int[] a2)
{
int[] newArr = new int[a1.length + a2.length];
int i = 0;
for(; i < a1.length; i++)
{
newArr[i] = a1[i];
}
for(int j = 0; i < newArr.length; i++, j++)
{
newArr[i] = a2[j];
}
return newArr;
}