joeho的专栏

class Person{ public final String x ="abc";//final 对象不能被修改 public String name; public int age; public Person(String name,int age) {  this.name = name;  this.age = age; } public void getInfo() {  Syste

enum Person{ 张三("脾气暴躁"),关公("讲义气"),刘备("爱哭"); private String feature; private Person(String feature) {   this.feature = feature; } public String getFeature(){  return this.reature; }

昨天面试的一道题，当时我是把答案写在纸上，也没有用IDE调今天再写一遍，测试通过，这样也证明了我的思路是正确的。下面这段代码还可以写得更优美点，比如用静态方法等。 /** * 将人民币大写转换成数字，并且保证数据不能超过一亿 * @author joeho * */public class RMBFormatOutPut { /**  * 测试输入  * @param args  */ p

/**类与对象*/class Person{ private int age; private String name; //构造函数 public Person() {  age = 60;  System.out.println("construct1 is calling----"); } public Person(String name,int age) {  this.name =

class lesson23{ public static void main(String args[]) {  int x[]=new int[100];  int sum=0;  for(int i=0;i  {   x[i]=i;   sum+=x[i];  }  System.out.println(sum);    int xx[][]=new int[2][3];  xx[0][0]

class test1{  public static void main(String args[]){    System.out.println("Hello,test1");  }}/*PATH 系统执行命令时，只会在PATH目录中去寻找。classpath当我们在设置了CLASSPATH环境变量时，执行JAVA命令后，JAVA虚拟机不再从当前目录去查找编译后的JAVA文件，而是直接在指定

class Producer implements Runnable{ Buffer q; public Producer(Buffer q) {  this.q=q; } public void run() {  int i=0;  while(true)  {    /*   synchronized(q)//   {    if(q.bFull)     try{q.wait();}catc

class Test{ public int devide(int x,int y) throws ArithmeticException,DevideByMinueException {  if(y   throw new DevideByMinueException("除数为"+y);  int result = x/y;   return result;  }}class DevideByM

package joeho.net.csdn.blog.io;import java.io.*; class EmployeeSerial  implements Serializable{ private String name = ""; private String departName = ""; private int age = 0; private int employe

package joeho.net.csdn.blog.io;import java.io.*;import java.nio.*;public class FileWriterReader {  /**  * Method main  *  *  * @param args  *  */ public static void main(String[] args) throws Except

interface PCI{ void start(); void stop();}class VedioCard implements PCI{ public void start() {  System.out.println("start vedio--- "); } public void stop() {  System.out.println("stop vedio-----");

//抽象类不能产生任何实例对象//接口是一种特殊的抽象类，/*abstract class A{ abstract void aa(int x,String str);} class B extends A{ void aa(int x,String str) {   } }*///接口中所有的方法默认的是publicinterface Runner{ int ID = 1; void run()

class PassParam{ int x; public static void main(String args[]) {  /*  int x=5;  change(x);  System.out.println(x);  */  PassParam obj = new PassParam();  obj.x=5;  change(obj);  System.out.println(obj

class Outer{ int count_1=100; void test() {  Inner iner=new Inner();  iner.display(); }  class Inner//如果将内部类类名前加上关键字static,那么内部类将变成外部类 {  void display()  {   System.out.println("count_1 ="+count_1);  

/**author:joeho*/class lesson22{ public static void main(String []args) {  int x=2;  if(x  {   System.out.println("x   System.out.println("OK");  }  else if(x>=3&&x   System.out.println("x>=3&&x  

class lesson2{ public static void main(String args[]){  //System.out.println("Hello world");  /*  int x,y;  //y=x=3;  y=x=0+3;  System.out.println("y="+y);  */  //char ch=97;  char ch=a;  int x=ch;