Java : Length of String

In this tutorial we are going to write logic to count the length of specified String.

Length of String : Length of string means the number of characters in your String. There is many way to find out the length of specified String. You can use String method to calculate length directly or you can write your own logic.

Example : In this example we are writing different way of finding the length of String str.

class StringLength {
	public static void main(String[] args) {
		String str = "Hello Roseindia";
		int count = 0;
		/* String method to print length of String */
		 System.out.println("Length of str : "+str.length());
		 System.out.println("Length of str : "+str.lastIndexOf(""));

		/* Simple logic to count length of String */
		for (char c : str.toCharArray()) {
			count++;
		}
		System.out.println("Length of str : " + count);
		/* Another way of counting length of String */
		int i = 0;
		try {
			while (true) {
				str.charAt(i);
				i++;
			}
		} catch (IndexOutOfBoundsException e) {
			System.out.println("Length of str : " + i);
		}

	}
}

Output :

Length of str : 15
Length of str : 15
Length of str : 15
Length of str : 15

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