baiqian3662-优快云博客

转载单例设计模式 Singleton

1 class Singleton{ 2 private static final Singleton INSTANCE=new Singleton(); 3 private Singleton (){} //构造方法私有化 4 public static Singleton getInstance(){ 5 return IN...

2016-10-09 15:20:00 79

转载代理设计模式

1 interface A 2 {public void get(); 3 } 4 class B implements A 5 {public void get(){ 6 System.out.println("出席活动"); 7 } 8 } 9 class C implements A10 {private A a;11 pub...

2016-09-27 17:26:00 60

转载工厂设计模式

1 interface A 2 {public void fintr(); 3 } 4 class B implements A 5 {public void fintr(){ 6 System.out.println("666"); 7 } 8 } 9 class C implements A10 {public void fint...

2016-09-27 17:10:00 93

转载抽象类的定义与使用

1 abstract class Action { 2 public static final int ECT=1; 3 public static final int WROLD=2; 4 public static final int Sleep=7; 5 public void cmmand(int fag){ 6 switch (fag)...

2016-09-24 15:42:00 89

转载 Java类（多项1对多映射）

1 class Province { 2 private int pid; 3 private String name; 4 private Stata stata; 5 private City citys [] ; 6 public void setStata(Stata stata){ 7 ...

2016-09-15 17:13:00 101

转载 Java类（1对多）

1 class Province { 2 private int pid; 3 private String name; 4 private City citys [] ; 5 public void setCitys(City citys[]){ 6 this.citys=citys; 7 }...

2016-09-15 10:50:00 78

转载简单Java类深入

①实现基本字段的转换：class Emp { private String ename; private int empno; private double sal; private double comm; private String job; //set.get略 public Emp() {} public Emp(String ename,int empno,do...

2016-09-12 22:01:00 76

转载 this关键字

class emp{private int empno ; private String ename; private String job ; private double sal ; public emp(){ this(1,"张三","前台",100); } public emp (int empno){ this(empno,"...

2016-09-08 17:44:00 65

转载 String常用方法

public class first{public static void main(String args[]){ String asd = "helloworld"; String asf = "hello world love"; System.out.println(asd.contains("hello"));//判断“hello”是否存在...

2016-09-07 19:55:00 76

转载测试

//public class Stringdemo//{public static void main (String args[]){// String ste="hello";// char st = ste.charAt(0);//取出指定索引的字符// System.out.println(st);// }//}/* public c...

2016-09-01 18:06:00 63

转载 String类的基本概念

2016-08-30 19:53:55(1.1)请解释在字符串相等的判断中"=="与"equals()"的区别 · "=="是java提供的关系运算符，主要功能是进行数值相等的判断，如果在String对象上表示的是内存地址数值的比较； · "equals()" 是由String提供的一个方法，此方法专门负责进行字符串内容的比较。 1...

2016-08-30 20:09:00 70