bluzelee2011的专栏

package com.cug.innerclass.thread;public class InnerClassThread { public static void main(String[] args) { //继承Thread实现 new Thread(){ public void run(){ for(int i=0;i<100;++i){ Syst

package IO_06;import java.io.IOException;import java.io.Reader;public class MyBufferedReader { private Reader r; public MyBufferedReader(){ } public MyBufferedReader(Reader r){ this.r = r;

package com.cug.datastream;import java.io.BufferedOutputStream;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;import java.io.SequenceInputStream;publ

package com.cug.datastream;import java.io.BufferedReader;import java.io.FileReader;import java.io.FileWriter;import java.io.IOException;import java.io.PrintWriter;public class PrintWriterDemo

package cn.itcast_02;import java.io.ByteArrayInputStream;import java.io.ByteArrayOutputStream;import java.io.IOException;/* * 内存操作流：用于处理临时存储信息的，程序结束，数据就从内存中消失。 * 字节数组： * ByteArrayInputStrea

package com.cug.linenumber;import java.io.FileReader;import java.io.IOException;import java.io.LineNumberReader;public class LineNumberReaderDemo { public static void main(String[] args) throws

package cn.itcast_01;import java.io.BufferedInputStream;import java.io.BufferedOutputStream;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOE

package com.cug.singleton;import java.io.IOException;public class RuntimeDemo { public static void main(String[] args) { Runtime rt = Runtime.getRuntime(); try {// rt.exec("notepad"); r

package cn.itcast_02;/** * @author Administrator * */public class Student implements Comparable { private String name; private int age; public Student() { super(); } public Student(Str

package com.cug.factory2;public abstract class Animal { public abstract void eat();}package com.cug.factory2;public class Cat extends Animal{ @Override public void eat() { System.out.pri

package com.cug.datastream;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;import java.io.ObjectInputStream;import java.io.ObjectOutputStream;/* * 序列

package cn.itcast_08;public class MyRunnable implements Runnable { @Override public void run() { for (int x = 0; x < 100; x++) { System.out.println(Thread.currentThread().getName() + ":" + x

改天在总结，有点小头疼...

package com.cug.singleton;public class Student { private Student(){ } //饿汉式 private static Student stu = new Student(); public static Student getStudent(){ return stu; }}package com.cu

import java.io.File;import java.text.ParseException;import java.text.SimpleDateFormat;import java.util.Date;import java.util.Timer;import java.util.TimerTask;/* * 需求：在指定的时间删除我们的指定目录(你可以指定c盘，但是

package cn.itcast_09;public class SellTicket implements Runnable { // 定义100张票 private int tickets = 100; //创建锁对象 private Object obj = new Object();// @Override// public void run() {// while

package cn.itcast_02;public class MyLock { // 创建两把锁对象 public static final Object objA = new Object(); public static final Object objB = new Object();}package cn.itcast_02;public class D

package cn.itcast_12;import java.util.ArrayList;import java.util.Collections;import java.util.Hashtable;import java.util.List;import java.util.Vector;public class ThreadDemo { public static v

package cn.itcast_08;public class SellTicket implements Runnable { // 定义100张票 private int tickets = 100;// @Override// public void run() {// while (true) {// // t1,t2,t3三个线程// // 这一次的ti

package com.cug.net09;import java.io.BufferedReader;import java.io.BufferedWriter;import java.io.FileReader;import java.io.IOException;import java.io.InputStreamReader;import java.io.OutputStre

package cn.itcast_02;/* * A:一个异常 * B:二个异常的处理 * a:每一个写一个try...catch * b:写一个try，多个catch * try{ * ... * }catch(异常类名 变量名) { * ... * } * catch(异常类名 变量名) { * ... *

1 Java 字符采用Unicode编码，每个字符占两个字节，因而可用十六进制编码形式表示。注：Unicode是全球语言统一编码2 boolean类型数据只允许取值 true或false，不可以0或非0的整数替代true和false，这点和C语言不同。3 byte,short,char—int—long—float—doublebyte,short,char相互之间补转换，他们

public interface Person { public String name(); public String sex(); @Deprecated public void sing();}public class Child implements Person { @Override public String name() { // TODO Auto

package com.imooc.reflect;import java.lang.reflect.Method;public class MethodDemo1 { public static void main(String[] args) { //要获取print(int ,int )方法 1.要获取一个方法就是获取类的信息，获取类的信息首先要获取类的类类型 A a

package com.cug.reflect;public class ReflectDemo02 { public static void main(String[] args) { Class c1 = int.class; Class c2 = String.class; Class c3 = double.class; System.out.println(c

package com.imooc.reflect;import java.lang.reflect.Method;import java.util.ArrayList;public class MethodDemo4 { public static void main(String[] args) { ArrayList list = new ArrayList();

public interface OfficeAble{ public void start();}public class Excel implements OfficeAble { public void start(){ System.out.println("excel run..."); }}public class Word implements OfficeAb

package com.imooc.reflect;public class ClassDemo1 { public static void main(String[] args) { //Foo的实例对象如何表示 Foo foo1 = new Foo();//foo1就表示出来了. //Foo这个类 也是一个实例对象，Class类的实例对象,如何表示呢 //任何一个类都是C

package cn.itcast_07;public class Student { private String name; private int age; private boolean flag; // 默认情况是没有数据，如果是true，说明有数据 public synchronized void set(String name, int age) { // 如果有数

package com.cug.datastream;import java.io.BufferedReader;import java.io.IOException;import java.io.InputStreamReader;public class SystemInDemo { public static void main(String[] args) throws IO

package com.cug.net03;import java.io.IOException;import java.net.DatagramPacket;import java.net.DatagramSocket;public class ReceiveDemo { public static void main(String[] args) throws IOExcepti

package com.cug.datastream;import java.io.IOException;import java.io.RandomAccessFile;public class RandomAccessFileDemo { public static void main(String[] args) throws IOException { writer();

package com.cug.datastream;import java.io.DataInputStream;import java.io.DataOutputStream;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;public class

package IO_04;import java.io.BufferedInputStream;import java.io.BufferedOutputStream;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOExceptio

package IO_03;import java.io.BufferedReader;import java.io.BufferedWriter;import java.io.FileReader;import java.io.FileWriter;import java.io.IOException;public class CopyFileDemo { public sta

package IO_02;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStreamReader;import java.io.OutputStreamWriter;/* * 面试题：close()和flu

package com.cug.datastream;import java.util.Properties;import java.util.Set;public class PropertyDemo { public static void main(String[] args) { Properties p = new Properties(); p.put("zhu",

/* 权限修饰符： 本类 同一个包下(子类和无关类) 不同包下(子类) 不同包下(无关类) private Y 默认 Y Y protected Y Y Y public Y Y Y Y*/package com.liuyi;public class Father { private void show() {

package cn.itcast_03;import java.util.Scanner;/* * 常用的两个方法： * public int nextInt():获取一个int类型的值 * public String nextLine():获取一个String类型的值 * * 出现问题了： * 先获取一个数值，在获取一个字符串，会出现问题。 * 主要原因