Convert Characters to Lower Case - A Java Code Example

To convert all upper case characters in a string to lower case, use the method toLowerCase() of the String class.
The example below shows how to use it. Note that the method returns a String so you'll need to assign the return value of the method to a variable (in this case the same variable).

/**
* Main.java
*
* @author www.javadb.com
*/
public class Main {

    /**
     * Converts all upper case characters to lower case
     */
    public void stringToLowerCase() {

        String str = "All Upper Case Characters In This String Will Be Converted To Lower Case";

        str = str.toLowerCase();

        System.out.println(str);
    }

    /**
     * Starts the program
     *
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        new Main().stringToLowerCase();
    }
}

The result of the above code when executed:

all upper case characters in this string will be converted to lower case

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