Quizzes

Decision Control Constructs in Java

Decision control statements can change the execution flow of a program. 

Decision control statements in Java are:

  • if statement

  • Conditional operator

  • switch statement

  [node:read-more:link]

Wrapper classes, Auto-boxing and Auto-unboxing

Wrapper classes

The wrapper classes provide a mechanism to "wrap" primitive values in an object so that the primitives can be included in activities only for objects, like being added to Collections. There is a wrapper class for every primitive in Java. The wrapper class for int is Integer and the class for float is Float and so on. Wrapper classes also provide many utility functions for primitives like Integer.parseInt(). [node:read-more:link]

Variables and Data Types in Java

A variable is something that can hold some data. Class variables or static variables belong to class. Instance variables are non-static variables belong to objects. Local variables are local within blocks or methods and they die when we exit that block or method. [node:read-more:link]

Operator Plus(+) Overloading in Java

Java doesn't allow operator overloading yet + is overloaded for class String. Here we will discuss examples for use of + with Strings and characters. [node:read-more:link]

Labels in Java

You are allowed to put a label on any statement. Labels are given points in code mainly used along with goto in some other languages. Labels are rarely needed in Java, which lacks a goto statement like some other languages.

In java, labels are mainly used by break and continue statements which normally terminate or continue the innermost block. [node:read-more:link]

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