Java Matcher find() method

The find method searches the specified pattern or the expression in the given subsequence characterwise and returns true otherwise it returns false.

Signature

There are 2 types of find method in java. The signature of find methods are given below

No.	Method	Description
1	boolean find()	Return true if match found in the input sequence.
2	boolean find(int start)	Return true if match found in the input sequence by the starting index.

Parameter

start- the index to start searching for a match

Returns

true if, and only if, a subsequence of the input sequence starting at the given index matches this matcher's pattern

Throws

IndexOutOfBoundsException- If start is less than zero or if start is greater than the length of the input sequence.

Example 1

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class BooleanFindMethodExample1 {
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Pattern p=Pattern.compile("java");
		Matcher m=p.matcher("HellojavaHellojava");
		int c=0;
		// finding matching char 
		while(m.find())
		{
		c=c+1;
		System.out.println("Start position of matching String "+m.start());
		System.out.println("End position of Matching String (java) "+m.end());
		}
		System.out.println(" Number of matches : "+c);
	}
}

Test it Now

Output:

Start position of matching String 5
End position of Matching String (java) 9
Start position of matching String 14
End position of Matching String (java) 18
Number of matches : 2

Example 2

import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class BooleanFindMethodExample2 {

	public static void main(String[] args) {
		Pattern p=Pattern.compile("java");
			Matcher m=p.matcher("HellojavaHellojava");
			int c=0;
			// finding matching char 
			while(m.find(6))
			{
				c=c+1;
	System.out.println("Start position of matching String (java) "+m.start());
	System.out.println("End position of Matching String (java) "+m.end());
			break;
			}
			System.out.println(" Number of matches : "+c);
		}
	}

Test it Now

Output:

Start position of matching String (java) 14
End position of Matching String (java) 18
Number of matches: 1

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