JAVA代码编译错误

Main.java:1: error: class, interface, or enum expected
public int subarraySum(int[] nums, int k) {
^
Main.java:3: error: class, interface, or enum expected
Map map=new HashMap<>();
^
Main.java:4: error: class, interface, or enum expected
for (int i=0;i

public int subarraySum(int[] nums, int k) {
    int sum=0,count=0;
    Map<Integer,Integer> map=new HashMap<>();
    for (int i=0;i<nums.length;i++){
        sum+=nums[i];
        if(sum==k){
            count++;
        }
        if(map.containsKey(sum-k)){
            count+=map.get(sum-k);
        }
        if(!map.containsKey(sum)){
            map.put(sum,1);
        }else {
            map.put(sum,map.get(sum)+1);
        }
    }
    return count;
}

到底哪里错了，帮忙改一下

不太清楚你这个题目要干嘛, 可以发下题吗