Java中的枚举类型，enum
public class MyEnumTestMain {
public enum MyenumTest{red,blue,green,black}//定义枚举类型
public static void main(String[] args) {
MyenumTest mt = MyenumTest.red;//red相当于枚举的静态属性
switch(mt){
case red:
System.out.println("red");
break;
case blue:
System.out.println("blue");
break;
default:
System.out.println("其他");
}
}
}
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表1 List接口定义的常用方法及功能
从表1可以看出，List接口提供的适合于自身的 ......
package Pack;
import java.text.*;
import java.util.*;
import java.text.DecimalFormat;
import java.util.*;
public class Test {
/**
* @param args
*/
public static void main(String args[]) {
yuesef(50,3);
}
public static void yuesef(int n, int m) {
ArrayList<Integer ......
class User {
String name;
String age;
public User(String name,String age){
this.name=name;
this.age=age;
}
public String getAge() {
return age;
}
public void setAge(String age) {
this.age = age;
}
public String getName() {
return name;
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public void setName(St ......
1. Multiply-Thread
Locks offer two primary features: mutual exclusion and visibility. Mutual exclusion means only one thread at a time may hold a given lock, so only one thread at a time will be using the shared data. Visibility is to ensure that changes made to shared data prior to releasing a lo ......
JAVA连接数据库大全
1．Oracle8/8i/9i数据库（thin模式）
Class.forName("oracle.jdbc.driver.OracleDriver").newInstance();
String url="jdbc:oracle:thin:@localhost:1521:ts"; //ts为数据库的SID
String user="sa";
String password="";
Connection conn= DriverManager.getConnection(url,u ......
