String methods – toString,toUppercase,toLowercase,toChararray

In this post, we will discuss about the string methods toString,toUppercase,toLowercase,toChararray.

Let’s see them one by one with examples.

String toString():

This method returns itself i.e. a same string.

public class StringMethodsEx {

	public static void main(String[] args)   {
		
		String val1 = "testingpool.com";
		System.out.println(val1.toString());
	}
}

String toUpperCase():

This methods converts all characters of a string into uppercase and returns a string.

public class StringMethodsEx {

	public static void main(String[] args)   {
		
		String val1 = "testingpool.com";
		System.out.println(val1.toUpperCase());
	}
}

String toLowerCase():

It converts all characters of a string into lowercase and returns string.

public class StringMethodsEx {

	public static void main(String[] args)   {
		
		String val1 = "TESTINGPOOL.COM";   // STRING IN UPPERCASE
		System.out.println(val1.toLowerCase());
	}
}

char[] toCharArray():

This method converts a string into  a new character array.

The length of the array will be same as length of the string.In the below example, it will result in the same string.

public class StringMethodsEx {

	public static void main(String[] args)   {
		
		String val1 = "TESTINGPOOL.COM";  
		char[] a = val1.toCharArray();
		
		for(char c : a){
			System.out.print(c);
		}
	}
}