Java入门基础之操作数组

Posted 2020-12-02 wangwg1994

1. 遍历数组：

   import java.util.Arrays;
   
   public class Circle {
       public static void main (String[] args){
           int[] ns = {32,4,2,6};
           for(int i=0; i<ns.length; i++){
               System.out.println(ns[i]);
           }
           
           for(int n:ns){
               System.out.println(n);
           }
           //使用Arrays.toString()方法来快速查看数组内容　　
           System.out.println(Arrays.toString(ns));
   
       }
   }

   2. 冒泡排序法：

   int[] ns = { 28, 29, 12, 5, 90, 23};
   for(int i=0;i<ns.length;i++){
   	for(int j=i+1; j< ns.length; j++){
   		if(ns[i] > ns[j]){
   			//交换ns[i]和ns[j]
   			int tem = ns[j];
   			ns[j] = ns[i];
   			ns[i] = tem;
   		}
   	}
   }
   System.out.print(Arrays.toString(ns));
   

   3.Arrays.sort()