length length() size() in java

length() : In String class we have length() method which is used to return the number of characters in string. Ex : String str = “Hello World”; System.out.println(str.length()); Str.length() will return 11 characters including space. length : we have length instance variable in arrays which will return the number of values or objects in array. For example : String days[]={” Sun”,”Mon”,”wed”,”thu”,”fri”,”sat”}; Will return 6 since the number of values in days array is 6

length method in java

public class LengthMethodDemo {

	public static void main(String[] args) {
		
        //declaring variables string1 & string2
		String string1 = "Java";
		String string2 = "Java Code";
	    
        //                 Java
        //count from left  1234  --> so length would be 4
		int lengthOfString1 = string1.length();  // 4
        //                 Java Code
        //count from left  123456789  --> so length would be 9
		int lengthOfString2 = string2.length();  // 9
		
		System.out.println("Length of String1 is : "+lengthOfString1);
		System.out.println("Length of String2 is : "+lengthOfString2);
		
		String string3="";
		System.out.println(string3.length());  //0
      
        String string4=null;
		System.out.println(string4.length());  //It will give NullPointerException
		
	}

}

Posted by: Guest on October-17-2021

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