java中数组的下标的数据类型是_java返回数组下标

package practice;

public class ArrayElementsAddIndices {

	public static void main(String[] args) {

		int array[] = { 5, 4, 3, 2, 1, 6, 7, 8, 9 };
		System.out.println("原数组中的元素：");
		for (int i = 0; i < array.length; i++) {
			System.out.print(array[i] + "    ");
		}
		for (int i = 0; i < array.length - 1; i++) {
			for (int j = i + 1; j < array.length; j++) {
				if (array[i] > array[j]) {
					int temp = array[i];
					array[i] = array[j];
					array[j] = temp;
				}
			}
		}
		
		System.out.println("\n\n数组元素选择排序：");
		for (int i = 0; i < array.length; i++) {
			System.out.print(array[i] + "    ");
		}
		
		System.out.println("\n\n数组元素及其对应下标：");
		for (int i = 0; i < array.length; i++) {
			System.out.println(array[i] + " —— " + i);
		}

		int newArray[] = new int[array.length];
		System.out.println("\n原数组元素加上对应下标后生成的结果元素：");
		for (int i = 0; i < newArray.length; i++) {
			System.out.print((newArray[i] = array[i] + i) + "    ");
		}

	}

}