去 宇龙 面试被刷下来了，郁闷，散分！！！

[jan4984]

面试官问：jdk1.2和j2sdk1.4.1的区别？
我答:说实在，我不知道，没研究过。
郁闷！！！！

[iamwls]

估计是你的经验写的是两年以上，否则问这个问题的人问的过份

1。4重写了SWING，大大提高了速度，
添加了nio包，
支持正则表达式，
支持JDBC2。0
将opertaion pack包放到正式类库里
提供XML解析包
支持。。。估计我面试能答出这么多

[noratong]

jkit(郁闷之堕落的程序员)说的很对,要真的让你说出他们的具体区别,那就是让你把它的Api都背下来,这是肯定不可能的.它们的区别也就在Api上了嘛.谁有本事说清楚呢.

我看概括的回答几句应该就可以了,回答的话上面的兄弟们都告诉你了,看来你没有很好的把握这次机会哟.可惜

[AllError]

还有增加了corba类

[AllError]

不过宇龙不去也罢.工资又不高.要求倒是挺高,请我去我也不去

[giftxi]

是哪里的公司，这种问题太大。其实那么多人用JAVA，精通的也没几个。
学习！

[nirvana_hg]

我觉得也是，要我就告诉他：抱歉，鄙人从最开始就是用jdk1.3，不知道1.2啥样。
嘿嘿嘿嘿……

[jan4984]

iamwls(我想天是我) ，jdbc是3.0啊。呵呵。

[jan4984]

没人10分，后面的没办法啦，只有200，分完为止，以后有机会再给。

[littlecpu]

有空看看JDK的what's new

[allen830826]

对！
1.4重写了swing

[littlecpu]

据java.sun.com的资料
=========================
1.4.2
=========================
Enhancements and Changes
Java 2 SDK, Standard Edition
Version 1.4.2


Introduction

OS & Hardware Platforms
Supported System Configurations
64-Bit Intel Itanium Processors
Virtual Machine
Runtime Performance
Client Hotspot Compiler
Server Hotspot Compiler
Core Libraries
Networking
New I/O
I/O
Internationalization
JAXP
Security
Integration Libraries
CORBA, Java IDL, and Java RMI-IIOP
Java Naming and Directory Interface API
User Interface
Java Sound Technology
Java 2D Technology
Input Methods
AWT
Swing
Deployment
Java Update (1.4.2_01 and higher)
Startup Time Improvements
Applets
Java Plug-in Technology
Java Web Start 1.4.2
Tools and Tool Architecture
Java Platform Debugger Architecture
Java Virtual Machine Profiler Interface
Java Compiler (javac)
Javadoc Tool

=========================
1.4.1
=========================
Enhancements and Changes in J2SE 1.4.1 Platform



Contents


Introduction
Developer Releases for 64-Bit Intel Itanium Processors
Java Web Start 1.2
Compiler and Class File Format Changes
Javadoc Changes
Java Naming and Directory Interface API
Networking
RMI
AWT Changes
Swing Changes
Internationalization
Shift-JIS Character Encoding Change
Security
Enhancements to Java Plug-in Technology
Kerberos Service and DNS Lookups
Virtual Machine
Support for SPARC® v8 (SPARCstation®) Processors
Java Platform Debugger Architecture

[littlecpu]

=====================
1.4.2
=====================

Summary of New Features and Enhancements Since1.3

Java 2 Platform
XML Processing
New I/O APIs
Security
Java 2DTM technology
Image I/O Framework
Java Print Service
AWT
Swing
Drag and Drop
Logging API
JavaTM Web Start Product
Long-term Persistence of JavaBeansTM Components
JDBCTM 3.0 API
Assertion Facility
Preferences API
Chained Exception Facility
Endorsed Standards Override Mechanism
Java Virtual Machines
Performance
Networking Support, Including IPv6
RMI
Serialization
Java Naming and Directory InterfaceTM (JNDI)
CORBA, Java IDL, and RMI-IIOP
JavaTM Platform Debugger Architecture
Internationalization
JavaTM Plug-in Product
Collections Framework
Accessibility
Regular Expressions
Math
Reflection
Java Native Interface
Tools
Tools and Utilities

[littlecpu]

==============================
1.3.1
==============================
Java 2 SDK, Standard Edition, version 1.3
Summary of New Features and Enhancements



Java 2 Platform
Java Naming and Directory Interface (JNDI)
Remote Method Invocation (RMI)
RMI/IIOP
CORBA ORB
Java IDL compiler, idlj
Drag and Drop Enhancements
Java Sound
Applet Deployment Enhancements
Java 2D Enhancements
Swing Enhancements
AWT Enhancements
Security Enhancements
Networking Enhancements
Reflection Enhancements
Object Serialization Enhancements
Accessibility Enhancements
Input Method Framework
Collections Framework Enhancements
Enhancements to java.math
Enhancements in java.lang and java.util.*
Enhancements to the Extension Mechanism and Jar Files
Support for Motif 2.1
Performance
Performance
Tool Support
Java Platform Debugger Architecture (JPDA)
Tools
Tools and Utilities

[CD2]

你应该反问他jdk1.5的特性:)

[littlecpu]

====================
1.2
====================

Java Development Kit (JDKTM) Version 1.2
Summary of New Features

Java Platform
Security Enhancements
Swing (JFC)
Java 2DTM (JFC)
Accessibility (JFC)
Drag & Drop (JFC)
Application Services (JFC)
Collections
Extensions Framework
JavaBeansTM Architecture Enhancements
Input Method Framework
Version Identification
RMI Enhancements
Serialization Enhancements
Reference Objects
Audio Enhancements
JavaTM IDL
JAR Enhancements
JNI Enhancements
Reflection Enhancements
JDBCTM Enhancements
Performance Enhancements

Floating Point Changes

JavaTM Plug-In
JavaTM Plug-In
Tool Support
JavaTM Virtual Machine Debugger Interface
JavaTM Virtual Machine Profiler Interface
Tools
Command Line Changes from 1.1 to 1.2
JDK Tools Changes
JavaTM Compiler
Javadoc Enhancements
JavaTM Launcher

[littlecpu]

=====================
JDK1.1
=====================

JDK 1.1 New Feature Summary
NOTE - JDK 1.1.8 is a maintenance release, with no new features over earlier versions of JDK 1.1. In general, documentation that refers to "JDK 1.1" applies equally well to "JDK 1.1.8".
These are the new features in version 1.1 of the JDK. All of the APIs listed here are part of the core Java API, which means they will be available on all platforms and operating systems where the Java 1.1 Virtual Machine is present.

Internationalization

Security and Signed Applets

AWT Enhancements

JavaBeansTM

JAR File Format

Networking enhancements

IO Enhancements

Math Package

Remote Method Invocation

Object Serialization

Reflection

JDBCTM - Java Database Connectivity

Inner Classes

Java Native Interface

[littlecpu]

1.0的文档都是古董级的了，下也没得下啦。

[iamwls]

to jan4984(Janny) 呵呵，是啊，搞错了，不好意思

[jigsaw]

最重要的就是collection跟swing重写吧？

[godsmother]

不是因为这个问题就被拒绝了吧?
不要灰心呦!