通过Class类的getDeclaredMethods方法可以获取某个类所定义的所有方法。 public Method[] getDeclaredMethods() throws SecurityException 1. 2.2获取公共方法 通过Class的getMethods方法可以获取到所有public修饰的公共方法。 public Method[] getMethods() throws SecurityException 1. 2.3获取指定方法 通过Class类的getMethod...
importjava.util.Date;publicclassDateMethodsExample{publicstaticvoidmain(String[]args){DatecurrentTime=newDate();DatefutureTime=newDate(currentTime.getTime()+1000);// 1000毫秒后的时间System.out.println("当前时间:"+currentTime);System.out.println("1000毫秒后的时间:"+futureTime);System.out.println(...
import java.text.SimpleDateFormat; import java.util.Date; //方法测试 public class DateMethods { public static void main(String[] args) { Date date = new Date(); //返回自 1970 年 1 月 1 日 00:00:00 GMT 以来此 Date 对象表示的毫秒数。 long l = date.getTime();//和System.currentT...
As of JDK 1.1, the Calendar class should be used to convert between dates and time fields and the DateFormat class should be used to format and parse date strings. The corresponding methods in Date are deprecated. Although the Date class is intended to reflect coordinated universal time ...
Java 7has the following date and time classes and methods. Each of these classes are also explained in their own pages, later. See the links at the bottom of this page, or at the top right of every page. If you need to do simple timing theSystem.currentTimeMillis()method will do jus...
Method[]getDeclaredMethods():返回此Class象对应类的全部方法, 示例User类 packagecom.zmd.classTest;importjavax.sound.midi.Soundbank;/*** @ClassName User * @projectName: object1 *@author: Zhangmingda * @description: XXX * date: 2021/5/16.*/publicclassUser {privatestaticString name;privateintage...
public class MethodReference {public static void println( String s ) {System.out.println( s );}public static void main( String[] args ) {final Collection< String > strings = Arrays.asList( "s1", "s2", "s3" );strings.stream().forEach( MethodReference::println );}}main方法的最后一行...
Date(Int64) Constructs aDateobject using the given milliseconds time value. Date(IntPtr, JniHandleOwnership) A constructor used when creating managed representations of JNI objects; called by the runtime. Properties Methods Explicit Interface Implementations ...
Why use methods? To reuse code: define the code once, and use it many times. Create a Method A method must be declared within a class. It is defined with the name of the method, followed by parentheses(). Java provides some pre-defined methods, such asSystem.out.println(), but you ...
In addition to the usual methods, theLocalDateclass offers getter methods for obtaining information about a given date. ThegetDayOfWeekmethod returns the day of the week that a particular date falls on. For example, the following line of code returns "MONDAY": ...