Java String toUpperCase() Method

The toUpperCase() Method:

This method converts all lower and Upper case characters of the invoking String to upper case.
The general form is:

String toUpperCase();

Consider the following Example:

ToUpperCaseTest.java

 class ToUpperCaseTest
 {
  public static void main(String arg[])
  {
   String str=" Hello Java";

   System.out.println("Before toUpperCase():"+str);
   System.out.println("After toUpperCase():"+str.toUpperCase());
  }
 }

The output generated by the following program is:
 Before toLowerCase():hello java
 After toLowerCase():HELLO JAVA

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