Java String toLowerCase() methods

Java String toLowerCase() method is used to convert all the characters of the String into lower case.

Syntax:

public String toLowerCase()             
public String toLowerCase(Locale locale)

Returns:

It returns Lower case String

Java String toLowerCase() Example 1:

public class JavaStringtoLowerCaseEx1 {
    public static void main(String args[]) {
        String S1 = new String("UPPERCASE CONVERTED TO LOWERCASE");
        //Convert to LowerCase
        System.out.println(S1.toLowerCase());
    }
}

Output:

uppercase converted to lowercase

Java String toLowerCase() Example 2:

 public class JavaStringtoLowerCaseEx2
    { 
        public static void main(String[] args)
        { 
            String str  = " TUTORIAL AND EXAMPLE";
           System.out.println(str.toLowerCase());
            }
  }

Output:

tutorial and example

Java String toLowerCase() Example 3:

public class JavaStringtoLowerCaseEx3
    { 
        public static void main(String[] args)
        { 
            String str  = "tutorialandexample";
            String str2 = "TUTORIALANDEXAMPLE";      
           System.out.println(str2.toLowerCase().equals(str));
            }
  }

Output:

true

Java String toLowerCase(Locale locale) Method Example 4:

import java.util.Locale;
public class JavaStringtoLowerCaseEx4
{
    public static void main(String args[])
    {
        String s = "YOU LOVE PYTHON, BUT I LOVE JAVA.";
        // Locales with the language "tr" for TURKISH
        //"en" for ENGLISH is created
        Locale TURKISH = Locale.forLanguageTag("tr");
        Locale ENGLISH = Locale.forLanguageTag("en");
        // converting string s to lowercase letter
        // using TURKISH and ENGLISH language
        String S1 = s.toLowerCase(TURKISH);
        String S2 = s.toLowerCase(ENGLISH);
        System.out.println("In turkish language: "+S1);
        System.out.println("In English language: "+S2);
    }
}

Output:

In turkish language: you love python, but ? love java.
In English language: you love python, but i love java.