插入排序（JAVA）

package sort20171111;

import java.util.*;

public class Insertion {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        
        int []a = new int[20];
        int n;
        Scanner in = new Scanner(System.in);
        n = in.nextInt();
        for(int i = 0; i < n; i++) {
            a[i] = in.nextInt();
        }
        
        //插入排序
        for(int i = 1; i < n; i++) {
            for(int j = i; j > 0; j--) {
                if(a[j] < a[j - 1]) {
                    int temp;
                    temp = a[j];
                    a[j] = a[j - 1];
                    a[j - 1] = temp;
                }
            }
        }
        
        for(int i = 0; i < n; i++) {
            System.out.println(a[i]);
        }

    }

}