摘要： 方法一： public class PropertyConfig { private static class PropertyConfigInstance { private static final PropertyConfig _instance = new PropertyConfig(); } public static PropertyConf... 阅读全文

摘要： public class front0add { public static void main(String[] args) { // TODO Auto-generated method stub String newString = String.format("%04d",718); System.out.println("... 阅读全文