Array Reallocation

import java.util.Arrays;
public class ArrayReallocationDemo {

public static void main(String[] args) {
int[] data1 = new int[] { 1, 3, 5, 7, 9 };

printArray(data1);
int[] data2 = Arrays.copyOf(data1, 6);
data2[5] = 11;
printArray(data2);

int[] data3 = Arrays.copyOfRange(data1, 2, 10);
printArray(data3);
}

// print array elements
private static void printArray(int[] data) {
StringBuilder stringBuilder = new StringBuilder("[");
for (int i = 0; i < data.length; i++) {
stringBuilder.append(data[i]);
if (i < data.length - 1)
stringBuilder.append(", ");
}
stringBuilder.append("]");
System.out.println(stringBuilder);
}
}
//[1, 3, 5, 7, 9]
//[1, 3, 5, 7, 9, 11]
//[5, 7, 9, 0, 0, 0, 0, 0]