Java program for Pattern Matching

public void getMatches(String text_file_string, String match_string )
{
    int n,m;
    n=text_file_string.length();
m=match_string.length();
char[] text_file=new char[n];
text_file_string.getChars(0, n, text_file, 0);
char[] match_str=new char[m];
match_string.getChars(0, m, match_str, 0);
int cntr=0;

for (int i=0,j=0; i<=n-m;i++) {
      cntr++;
if(text_file[i]==match_str[0])


{
if (text_file[i+m-1]==match_str[m-1])
{
for(j=0;j<m;j++ )
{
cntr++;

if(text_file[i+j]!=match_str[j])
break;
}
if(j==m)
{
System.out.println("Mathc found at"+ (i+1));
i=i+m;
}
}
}


}

}