Date类

rt.jar/java.util包下

public class Date
    implements java.io.Serializable, Cloneable, Comparable

public Date()
public Date(long date)

//获取当前时间戳
public long getTime()
    
//当前时间是否早于指定时间
public boolean before(Date when)
    
//当前时间是否晚于指定时间
public boolean after(Date when)

//实例化1
Date date = new Date();
//实例化2
long tmpDate = 1635432199L;
Date date2 = new Date(1635432199L);
//普通方法
//获取时间戳
long result = date.getTime();
System.out.println("当前时间戳 = " + result);
//当前时间是否早于指定时间
boolean beforeFlag = date.before(date2);
System.out.println(beforeFlag);
//当前时间是否晚于指定时间
boolean afterFlag = date.after(date2);
System.out.println(afterFlag);