Issue 2 test case not passed

#1 
    String ans="";
	int i=-1;
	int j=-1;
	HashMap<Character,Integer> map=new HashMap<>();
	int needCount=s2.length();
	for(int k=0;k<s2.length();k++){
		map.put(s2.charAt(k),map.getOrDefault(s2.charAt(k),0)+1);
	}
	HashMap<Character,Integer> map2=new HashMap<>();
	int useful=0;
	
	while(true){
		boolean f1=false;
		boolean f2=false;
		while(i<s1.length()-1&& useful<needCount){
            i++;
			char ch=s1.charAt(i);
			map2.put(ch,map2.getOrDefault(ch,0)+1);
			if(map2.getOrDefault(ch,0)<=map.getOrDefault(ch,0)){
				useful++;
			}
			f1=true;
			
		}
        
		while(j<i&&useful==needCount){
        
			String temp=s1.substring(j+1,i+1);
			if(ans.length()==0||temp.length()<ans.length()){
				ans=temp;

			}
            j++;
            char ch=s1.charAt(j);
            
           if(map2.get(ch)==1){
               map2.remove(ch);
           }else{
               map2.put(ch,map2.get(ch)-1);
           }
            if(map2.getOrDefault(ch,0)<map.getOrDefault(ch,0)){
                useful--;
            }
			f2=true;
		}
		if(f1==false&&f2==false){
			break;
		}


	}



	return ans;
#2

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