Java2007-09-08
Garbage Collection in Java
Since objects are dynamically allocated by using the new operator, you might be wondering how such objects are destroyed and their memory released for later reallocation. In some l
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Java2007-09-08
this keyword in Java
Sometimes a method will need to refer to the object that invoked it. To allow this, Java defines the this keyword. this can be used inside any method to refer to the current object
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Use of - new - in Java
The new operator dynamically allocates memory for an object. It has this general form:
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Use of return statement in Java
The last control statement is return. The return statement is used to explicitly return from a method. That is, it causes program control to transfer back to the caller of the meth
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Use of continue statement in Java
Sometimes it is useful to force an early iteration of a loop. That is, you might want to continue running the loop, but stop processing the remainder of the code in its body for th
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Using break as a Form of Goto
In addition to its uses with the switch statement and loops, the break statement can also be employed by itself to provide a "civilized" form of the goto statement. Java does not h
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Java2007-09-07
Using break to Exit a Loop
By using break, you can force immediate termination of a loop, bypassing the conditional expression and any remaining code in the body of the loop. When a break statement is encoun
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for loop in java
The for loop operates as follows. When the loop first starts, the initialization portion of the loop is executed. Generally, this is an expression that sets the value of the loop c
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do-while loop in java
If the conditional expression controlling a while loop is initially false, then the body of the loop will not be executed at all. However, sometimes it is desirable to execute the
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while loop in java
The while loop is Java's most fundamental looping statement. It repeats a statement or block while its controlling expression is true. Here is its general form:
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switch in java
The switch statement is Java's multiway branch statement. It provides an easy way to dispatch execution to different parts of your code based on the value of an expression. As such
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? - ternary (three-way) operator - in Java
Java includes a special ternary (three-way) operator that can replace certain types of if then- else statements. This operator is the ?, and it works in Java much like it does in C
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