1 package array;
2
3 import java.util.Arrays;
4
5 public class ArrayDemo06 {
6 public static void main(String[] args) {
7 int[] a = {1,2,3,4,9090,31231,543,21,3,23};
8 System.out.println(a);//[I@1b6d3586
9 //打印数组元素Arrays.toString
10 System.out.println(Arrays.toString(a));
11
12 Arrays.sort(a);//数组进行排序：升序
13 printArray(a);
14 }
15 public static void printArray(int[] a){
16 for (int i = 0; i < a.length; i++) {
17 if(i==0){
18 System.out.print("[");
19 }
20 if (i==a.length-1){
21 System.out.println(a[i]+"]");
22 }else{
23 System.out.print(a[i]+", ");
24 }
25 }
26 }
27 }
1 package array;
2
3 import java.util.Arrays;
4
5 public class ArrayDemo06 {
6 public static void main(String[] args) {
7 int[] a = {1,2,3,4,9090,31231,543,21,3,23};
8 System.out.println(a);//[I@1b6d3586
9 //打印数组元素Arrays.toString
10 System.out.println(Arrays.toString(a));
11
12 Arrays.sort(a);//数组进行排序：默认升序
13 System.out.println(Arrays.toString(a));
14 printArray(a);
15
16 //数组填充：fill
17 Arrays.fill(a,0);//数组a用0填充
18 System.out.println(Arrays.toString(a));
19 Arrays.fill(a,2,4,100);//数组的2-4位用0填充
20 System.out.println(Arrays.toString(a));
21
22 }
23 public static void printArray(int[] a){
24 for (int i = 0; i < a.length; i++) {
25 if(i==0){//第一个
26 System.out.print("[");
27 }
28 if (i==a.length-1){//最后一个
29 System.out.println(a[i]+"]");
30 }else{//其余
31 System.out.print(a[i]+", ");
32 }
33 }
34 }
35 }
