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public class Datetime {
public static void main(String args[]){
java.util.Date current=new java.util.Date();
java.text.SimpleDateFormat sdf=new java.text.SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String c=sdf.format(curren ...
import java.text.DecimalFormat;
public class Exec {
public static void main(String[] args) {
Clock c1 = null;
try {
c1 = new Clock(18, 4, 14);
} catch (Exception e) {
e.printStackTrace();
c1 = new Clock();
}
System.out.println(c1.toString());
}
}
class Clock ...
public class Exec {
public static void main(String[] args) {
Book b1 = new Book();
System.out.println("当前有" + Book.counter + "个对象");
Book b2 = new Book();
System.out.println("当前有" + Book.counter + "个对象");
Book b3 = new Book();
System.out.pri ...
import java.text.DecimalFormat;
public class Exec {
public static void main(String[] args) {
Customer c1 = new Customer();
System.out.println("客户ID： " + c1.getCustomerId());
Customer c2 = new Customer();
System.out.println("客户ID： " + c2.getCustomerId());
...
import java.lang.reflect.Field;
import java.lang.reflect.Modifier;
import java.sql.Timestamp;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
public class Exec {
public static void main(String[] args) {
Calendar birthday = Calendar.getInstance();
...