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Exercise:

Convert the value of txt to upper case.

String txt = "Hello"; System.out.println(txt.toUpperCase());

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String txt = "Hello";
System.out.println(w3exercise_input_no_0
.w3exercise_input_no_1
);

Completed 0 of 59 Exercises:

Java Syntax

Exercise 1 Exercise 2 Go to Java Syntax Tutorial

Java Variables

Exercise 1 Exercise 2 Exercise 3 Exercise 4 Exercise 5 Go to Java Variables Tutorial

Java Data Types

Exercise 1 Exercise 2 Exercise 3 Go to Java Data Types Tutorial

Java Operators

Exercise 1 Exercise 2 Exercise 3 Exercise 4 Go to Java Operators Tutorial

Java Strings

Exercise 1 Exercise 2 Exercise 3 Exercise 4 Exercise 5 Exercise 6 Go to Java Strings Tutorial

Java Math

Exercise 1 Exercise 2 Exercise 3 Go to Java Math Tutorial

Java Booleans

Exercise 1 Exercise 2 Go to Java Booleans Tutorial

Java If...Else

Exercise 1 Exercise 2 Exercise 3 Exercise 4 Exercise 5 Go to Java If...Else Tutorial

Java Switch

Exercise 1 Exercise 2 Go to Java Switch Tutorial

Java Loops

Exercise 1 Exercise 2 Exercise 3 Exercise 4 Exercise 5 Exercise 6 Go to Java Loops Tutorial

Java Arrays

Exercise 1 Exercise 2 Exercise 3 Exercise 4 Exercise 5 Exercise 6 Go to Java Arrays Tutorial

Java Methods

Exercise 1 Exercise 2 Exercise 3 Exercise 4 Exercise 5 Go to Java Methods Tutorial

Java Classes/Objects

Exercise 1 Exercise 2 Exercise 3 Exercise 4 Exercise 5 Exercise 6 Exercise 7 Exercise 8 Go to Java Classes/Objects Tutorial

Java Exceptions

Exercise 1 Exercise 2 Go to Java Exceptions Tutorial