importjava.time.LocalDate;publicclassEmployeeimplementsComparable<Employee>{privateLongid;privateStringname;privateLocalDatedob;@OverridepublicintcompareTo(Employeeo){returnthis.getId().compareTo(o.getId());}} UsingComparableinterface, we can sort all types of objects including strings, wrapper classes or...
前面提到过的Comparable接口也可以用抽象类来表示,接口实现关系也可以用继承来实现,例如: packagetest;publicabstractclassComparable<T>{publicabstractintcompareTo(T o); } Employee类来继承Comparable抽象方法后必须也必须实现compareTo方法: packagetest;publicclassEmployeeextendsComparable<Employee>{ @Overridepublicintco...
如果需要对一组对象进行排序建议优先使用Comparable
成员变量entireDeck是一个元素类型为Card的List实例,而Card接口扩展了Comparable。PlayingCard类如下所示实现了Comparable.compareTo方法: public int hashCode() { return ((suit.value()-1)*13)+rank.value(); } public int compareTo(Card o) { return this.hashCode() - o.hashCode(); } compareTo方法...
Namespace: Java.Lang Assembly: Mono.Android.dll This interface imposes a total ordering on the objects of each class that implements it.C# 复制 [Android.Runtime.Register("java/lang/Comparable", "", "Java.Lang.IComparableInvoker")] [Java.Interop.JavaTypeParameters(new System.S...
Classes in java.lang that implement Comparable class Byte The Byte class wraps a value of primitive type byte in an object. class Character The Character class wraps a value of the primitive type char in an object. class Double The Double class wraps a value of the primitive type ...
Uses of Comparable in java.lang Classes in java.lang that implement Comparable Modifier and TypeClass and Description class Boolean The Boolean class wraps a value of the primitive type boolean in an object. class Byte The Byte class wraps a value of primitive type byte in an object....
与Comparable接口不同,比较器可以可选地允许空参数的比较,同时保持等价关系的要求。 该接口是Java集合框架的成员。 方法 Java 8中的Comparator接口引入了一些新特性和方法来提供更灵活和方便的比较操作。以下是Java 8中Comparator接口的新特性和方法总结: 默认方法(Default Methods):Java 8在接口中引入了默认方法,这些...
packagecn.com.Classwork190124;importjava.util.Scanner;publicclassTestInterface{publicstaticvoidmain(String[]args){Scanner sc=newScanner(System.in);ComparableCircle c1=newComparableCircle();ComparableCircle c2=newComparableCircle();c1.setRadius(sc.nextDouble());c2.setRadius(sc.nextDouble());System.out...
Java接口本身没有任何实现,因为Java接口不涉及表象,而只描述public行为,所以Java接口比Java抽象类更抽象化。但是接口不是类,不能使用new 运算符实例化一个接口。如 x=new comparable(…);//这个是错误来的。但是可以声明接口变量Comparable x; //这是允许的。