Answer 1

Try this.

public static int findPattern(String str, String[] patt) {
int count=0;
StringTokenizer st = new StringTokenizer(str, " ,.;:");
while (st.hasMoreTokens()) {
String tok = st.nextToken();
for (String s: patt) {
if (tok.equals(s)) count++;
}
}
return count;
}

public static void main(String[] args) {
String str = "This is a test, the test is simple. You are good.";
String[] patt = {"is", "the", "are"};
System.out.println("Pattern count = "+findPattern(str, patt));
}