Given two strings S1 and S2. Delete from S2 all those characters which occur in S1 also and finally

Given two strings S1 and S2. Delete from S2 all those characters which occur in S1 also and finally create a clean S2 with the relevant characters deleted.

 

public class StringManipulation {
 public static void main(String args[]) {
  String s1 = "ba";
   String s2 = "cbaaaabbcaaaa";
   
   
   for (int i = 0; i < s1.length(); i++) {
    for (int j = 0; j>=0 && s2.length()>0 &&j < s2.length(); j++) {
    
     while(s1.charAt(i) ==s2.charAt(j)){//处理连续状况
      s2 = s2.substring(0, j) + s2.substring(j + 1);
        j--;
        System.out.println(s2+s2.length()+"  "+j);
        if(j<0){j=0;}
        if(s2.equals(""))break;
     }
    }
   }  System.out.println(s2+"!!!");
 }
}