To determine whether two strings are variant words __boolean

Determine whether two strings are variants of each other the public
class bianstring{
	//judgment string is a variant of the word public
	static Boolean isdeformation (String str1, String str2)
	{

		if (str1==null| | str2==null| | Str1.length ()!=str2.length ())
		{return
			false;
		}
		Char[]ch1=str1.tochararray ();
		Char[]ch2=str2.tochararray ();
		Int[]map=new int[256]; The number of times the occurrence of each character is stored for
		(int i=0;i<ch1.length;i++)
		{
			map[ch1[i]]++
		}
		for (int i=0;i<ch2.length;i++)
		{
			if (map[ch2[i]]--==0) {return
				false;
			}
		}
		return true;

	}
	public static void Main (String[]args)
	{
      String str1= "123";
      String str2= "231";

      String str3= "123";
      String str4= "1223";
      System.out.println (Isdeformation (STR1,STR2));
      System.out.println (Isdeformation (STR3,STR4));
	}