随手敲代码——删除数组重复元素(最高效版)

public static int[] removeReplicate(int[] a){
int length = 0;
boolean isExists = false;
for(int i = 0;i <= a.length - 1;i++){
for(int j = i + 1;j <= a.length - 1;j++){
if(a[i] == a[j]){
isExists = true;
break;
}
}
if(!isExists){
a[length] = a[i];
length++;
}
isExists = false;
}
int[] b = Arrays.copyOf(a, length);
return b;
}