[CHAPTER 2]
Constructor
	set up the object instance

Overload
	several constructors exists in the same class

Request Class to perform method()

Identifer
	A name for a variable, method, or class
	No begin with a digit
	No contain any spaces/
	Case-sensitive

Initializer
	the initial value defining a veriable

Access specifier
Data type
Variable name

Access specifier
Method type
Method name
Optional parameters

Two way to terminate a method
	{
	Return ;

void
	indicates that this method does not return any results when
	it completes its task.

[CHAPTER 3]
Promotion rules  
	When two different types are involved in an expression, the smaller
	type (fewer bits) is promoted to the larger type before expression 
	is evaluated.

Arithmetic Operators
Numeric Operators Precedence
Prefix Increment /Decrement Operator


[CHAPTER 4]
innermost enclosing loop

import.java.io.*;
(x = getInt;)
public static int getInt() throws IOException
{
	BufferedReader keyborad = 
		new BufferedRead(new InputStreamReader(System.in));
	String input = keyboard.readLine();
	return(Integer.parseInt(input));
}

[CHAPTER 5]
The same reference variable is now used to reference another object
instance

we have use "this" reference to explicity refer to the instance
variables

protected void finalize(){
}

object = null;
System.gc();


[Tutorial 4]
e.getActionCommand
	returns the string inside the text field
	or caption of a label
e.getSource
	return the object reference that caused the event.
	
[CHAPTER 6]
.length()
.CharAt(int index)
.equals(string str)
.equalsIgnoreCase(string str)
.compareTo(string str)
.regionMatches(int toffset,String other,int ooffset,int len)
.indexOf(char c,int fromIndex)	|| forward
.lastIndexOf(char c,int fromIndex)	|| backward
.subString(int beginIndex,int endIndex)
.concat(String str)
.toUpperCase()
.toLowerCase()
.replace(char oldChar, char newChar)
.trim()

STRINGBUFFER
.ensureCapacity(int minimumCapacity)
.length()
.capacity()
.setLength()
.setCharAt(int index,char newChar)
.reverse()
.inset(int index, char newChar)
.deleteCharAt(int index)

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