用Java代码查看系统默认字符集编码
public class EchoDefaultSystemEncoding
{
public static void main(String[] args)
{
String encoding = System.getProperty("file.encoding");
System.out.println("Default System Encoding:" + encoding);
}
}
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//=============================输出奇数
public class OddTest {
public static boolean isOdd(int i){
return i % 2 != 0; //比较 i % 2 == 0;注： -1%2 = -1
}
public static void main(String[] args) {
for(int i = -10; i <= 10; i++) {
System.out.println(isOdd(i));
}
}
}
// ......
//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 static void CentreWnd(Shell shell){
int width = shell.getMonitor().getClientArea().width;
int height = shell.getMonitor().getClientArea().height;
int x = shell.getSize().x;
int y = shell.getSize().y;
if (x > width) {
shell.getSize().x = width;
}
if (y > height) ......
1、饿汉式
package singleton;
/**
* 饿汉式单例
* @author 蒋明原
*
*/
public class HungrySingleton {
/**jvm保证instance只被初始化一次*/
private static HungrySingleton instance = new HungrySingleton();
/**阻止外部使用new实例化对象*/
private Hun ......
