Tutorial
Displaying text using printf() method
In addition to the print() and println() methods, the printf () method is also quite frequently used for displaying text th ... 89 Flags call also be provided in the format String to add further formatting. In addition, we can format dates and times.
Formulating Algorithms
Now that we have learnt about two of the control structures, we shall see how we can formulate algorithms using theses struc ... tialised num to 1. But for an operation whose identity value isn’t known, version 2 is the only approach that can be taken.
Naming Conventions for Identifiers
If you have observed every program written by us closely, you would have noticed certain similarities in the way we have ... a variable, a class, an interface or some other entity. Next : Mathematical operations in Java Prev : Java Comments
Taking Input as Command Line Arguments
You must have now by realised what String[] args within the declaration of the main method means. It represents a String a ... from the command line:
Next : Using ellipsis to accept variable number of argumentsPrev : Multi dimensional arrays
Default Constructor provided by Compiler
When we do not explicitly provide a constructor to our class, the compiler provides a default constructor which initialise ... ation error would be generated saying that x was not initialized } Next : Access Specfiers Prev : Get and Set Methods
Taking Input from the User
In the addition program that we have written, we have initialised the variables firstNumber and secondNumber with 3 and 4. ... ations in the next chapter. Next : Introduction to object oriented programming Prev : Mathematical operations in Java
this Keyword
The this keyword in Java returns a reference to the object on which the method being executed is invoked. We can use the r ... o argument constructor called”); // incorrect this(-1); } Next : Wrapper classesPrev : Static methods and variables
Branching Statements
We will now look at the last set of control statements in Java- branching statements. They are used to transfer control to ... now move to arrays in which the for loop is widely employed. Next : Arrays introduction Prev : Formulating algorithms
Nested try catch blocks
Exception handlers can be nested within one another. A try, catch or a finally block can in turn contains another set of try ... lly { System.out.println(“Finally in meth”); } } } The output is Finally in meth ArithmeticException caught Outer finally