Throwable API Documentation

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Access Modifier

private
public
protected
package
static
final
abstract

Hashcode Method

The hashCode() method of java.lang.Object

Anytime you override equals() you should also override hashCode(). The hashCode() method should ideally return the same int for any two objects that compare equal and a different int for any two objects that don't compare equal, where equality is defined by the equals() method. This is used as an index by the java.util.Hashtable class.

In the Car example equality is determined exclusively by comparing license plates; therefore only the licensePlate field is used to determine the hash code. Since licensePlate is a String, and since the String class has its own hashCode() method, we can sponge off of that.

public int hashCode() {

return this.licensePlate.hashCode();

}
Other times you may need to use the bitwise operators to merge hash codes for multiple fields. There are also a variety of useful methods in the type wrapper classes (java.lang.Double, java.lang.Float, etc.) that convert primitive data types to integers that share the same bit string. These can be used to hash primitive data types.

Object Class and Method

Object Class and Method

Operator Precedence

1) . [] ()
2) ++ -- ! ~ instanceof
3) new(type)expression
4) * / %
5) + -
6) << >> >>>
7) < > <= >=
8) == !=
9) &
10) ^
11) |
12) &&
13) ||

How to run Package Program

I am taking same example as in ur book i.e.
Created Cards Folder and then domains folder and file in it i.e. Suit.java,Playingcard.java
Created tests folder inside Cards folder and file TestPlayingCard.java

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Know How to Compile that
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In command Prompt be in Cards folder then write following command :-

1. javac -d . domain\Suit.java


2. javac -d . domain\PlayingCard.java


3. javac -d . tests\TestPlayingCard.java

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To Run
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In cards folder in command prompt


java cards.tests.TestPlayingCart

MR Excercis is added

MR excercise is added in Program->Program->Java Mr Program -> today date

Fwd: [java] New comment on Problem.

I had uploaed more program and setup is updated

---------- Forwarded message ----------
From: Anonymous <noreply-comment@blogger.com>
Date: Thu, Aug 19, 2010 at 10:49 PM
Subject: [java] New comment on Problem.
To: vivlinux@gmail.com


Anonymous has left a new comment on your post "Problem":

hello sir,
its very difficult to cope up with the theory without the practicle knowledge.
so pls add the remaining portion of the setup as soon as you can..
Akshay Arora



Posted by Anonymous to java at August 19, 2010 10:19 AM

jdk setup

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download this two and extract and install