Sun Java moved to the Partner repository
For Ubuntu 10.04 LTS, the sun-java6 packages have been dropped from the Multiverse section of the Ubuntu archive. It is recommended that you use openjdk-6 instead.
If you can not switch from the proprietary Sun JDK/JRE to OpenJDK, you can install sun-java6 packages from the Canonical Partner Repository. You can configure your system to use this repository via command-line:
add-apt-repository "deb http://archive.canonical.com/ lucid partner"
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//从数组a中删除数组b中存在的元素
String stra[] = {"g","b","c","h","k"};//原始数组
String strb[] = {"g","k"}; //移除的元素
ArrayList list = new ArrayList();
//方法一
for(int i=0;i<stra.length;i++){
int n=0;
......
public class Person implements Serializable {
private String name;
private int age;
private GregorianCalendar birthday;
public Person(){
}
p ......
public class EchoDefaultSystemEncoding
{
public static void main(String[] args)
{
String encoding = System.getProperty("file.encoding");
System ......
没有必要用一堆绕口的形容词来描述什么叫多态，只举出几个关键点。
设：gun为父类，shootgun和pistol为gun的子类。
Java:
class gun {
void shoot() {
......
在Java的世界里，无论类还是各种数据，其结构的处理是整个程序的逻辑以及性能的关键。由于本人接触了一个有关性能与逻辑同时并存的问题，于是就开始研究这方面的问题。找遍了大大小小的论坛，也把《Java 虚拟机规范》，《apress,.java.collections.(2001),.bm.ocr.6.0.shareconnector》，和《Thinking in Java》翻了也找不� ......
