Checking if two Strings are anagram of each other using basic Java

I am writing following code in java Netbeans which is working quite good for normal anagrams. But if the two text fields contain words which contain repetitive letters, then the code fail to work. What may be the problem and how can I solve it? I am quite basic to Java and cannot understand Arrays yet.

String s1= t1.getText(); 
String s2= t2.getText();  
int b=0,c=0;
if(s1.length()!=s2.length())
   System.out.print("No");
else {
   for(int i=0;i<s1.length();i++) {
      char s = s1.charAt(i);
      for(int j=0;j<s2.length();j++) {
         if(s==s2.charAt(j)){
            b++;
         } 
      }
      if(b==0)
         break;
   }
   if(b==0)
      System.out.print("No");
   else 
      System.out.print("YES");
} 
System.out.print(b);