组_数_维_二

/**
* 二维数组
*/
@SuppressWarnings("nls")
public static void erArray() {
String[][] array = new String[3][];
array[0] = new String[] { "a1", "b1", "c1", "d1", "e1" };
array[1] = new String[] { "a2", "b2", "c2" };
array[2] = new String[] { "a3", "b3", "c3", "d3", "e3" };

for (int i = 0; i < array.length; i++) {
for (int j = 0; j < array[i].length; j++) {
int a = (i + 1) * 100 + j + 1;
System.out.println("房间号码 : " + a + " , 住户名 : " + array[i][j]);
}
}
}


-----------------------------



int[] a = new int[] {0, 1, 3, 4};
        int[] b = new int[2];
a.equals(b);//判断两个数组是否相等
        Arrays.sort(a);//给数组排序
        Arrays.binarySearch(a, 5);//根据制定的元素查找数组中是否存在此元素，返回元素的下标