计算一个数组里的重复值并且删去(java)

 1 package Del_Same_Num;
 2 
 3 public class Del_Same_Num {
 4 
 5     static int count=0;
 6     
 7     //计算重复值
 8     public static int  count_same_number(int[] a)
 9     {
10         for(int i=0;i<a.length;i++)
11         {
12             for(int j=i+1;j<a.length;j++)
13             {
14                 if(a[i]==a[j]&&a[i]!=-1)
15                 {
16                     System.out.print("i="+i+":"+"j="+j+‘\t‘);
17                     a[j]=-1;
18                     count++;
19                     System.out.println("有重复值是"+a[i]);
20                 }
21             }
22         }
23         
24         
25         System.out.println("一共有"+count+"个重复值");
26         return count;
27         
28     }
29         
30     public static int[] change(int src[])
31     {
32         int length=src.length-count_same_number(src);
33         int[] target=new int[length];
34         
35         
36         int index=0;
37         for(int i=0;i<src.length;i++)
38         {
39             if(src[i]!=-1)
40             {
41                 target[index]=src[i];
42                 index++;
43             }
44         }
45         
46         
47         display(target);
48         return target;
49     }
50 
51     //显示
52     public static void display(int[] a)
53     {
54         for(int i=0;i<a.length;i++)
55         {
56             System.out.print(a[i]+" ");
57         }
58         System.out.println();
59     }
60     public static void main(String[] args) {
61         int a[]={1,1,1,2,2,3,4,4,5,5,6,7,19,20,21,21};
62         display(a);
63         change(a);
64     }
65 
66 }