publicclassPersonimplementsComparable<Person>{privateStringname;privateintage;// 构造函数、getter 和 setter 方法省略@OverridepublicintcompareTo(Personother){// 按照年龄升序排序returnthis.age-other.age;}} 在这个示例中,compareTo方法返回的结果是根据年龄比较的,如果调用person1.compareTo(person2),返回的结果...
/*** 商品po类*/publicclassItemsimplementsjava.lang.Comparable<Items>{privateString title;privateinthits;privateDate pubTime;publicItems() {}publicItems(String title,inthits, Date pubTime) {super();this.title =title;this.hits =hits;this.pubTime =pubTime; }publicString getTitle() {returntitle;...
public int compareTo(Items o) { int result = 0; //按照生产时间降序 result = - this.pubTime.compareTo(o.pubTime); if(0==result){//如果生产时间相同 就按照销售量升序排列 result = this.hits-o.hits; if(0==result){//如果销售量相同 按照名字降序排列 result = - this.title.compareTo(o...
单字段排序 下面是一个示例,演示了一个自定义类Person实现了Comparable接口,并使用compareTo方法按照年龄进行排序: public class Person implements Comparable<Person> { private String name; private int age; // 构造函数、getter 和 setter 方法省略 @Override public int compareTo(Person other) { // 按照年龄...
publicinterfaceComparable<T>{intcompareTo(Tt);} compareTo方法的通用约定与equals相似: 将此对象与指定的对象按照排序进行比较。 返回值可能为负整数,零或正整数,因为此对象对应小于,等于或大于指定的对象。 如果指定对象的类型与此对象不能进行比较,则引发ClassCastException异常(类转换异常)。
IComparable Methods CompareTo IDeprecated IFunctionalInterface IIterable IllegalAccessError IllegalAccessException IllegalArgumentException IllegalMonitorStateException IllegalStateException IllegalThreadStateException IncompatibleClassChangeError IndexOutOfBoundsException ...
//Reverse of natural order as specified in//Comparable interface's compareTo() methodComparator.reversed();//Reverse of order by nameComparator.comparing(Employee::getName).reversed(); 3.5. Other Collection Classes Comparators can also be used to control the order of certain data structures (such...
1.2. Implementing Comparable Comparable interface has a single abstract method compareTo() that objects need to implement to have a natural ordering. The objects must be mutually comparable and must not throw ClassCastException for any key in the collection. The compareTo() method must return a...
@NoArgsConstructorpublicclassComparableImpl<T>implementsComparable<T>{@JsonIgnore String sortType;@JsonIgnore String orderBy;@OverridepublicintcompareTo(Tthat){if(orderBy==null){return0;}int order=-1;if("desc".equals(sortType)){order=1;}try{Class clazz=that.getClass();Field field=clazz.getDe...
[Android.Runtime.Register("compareTo", "(Ljava/lang/Object;)I", "GetCompareTo_Ljava_lang_Object_Handler:Java.Lang.IComparableInvoker, Mono.Android, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null")] public int CompareTo (Java.Lang.Object o); Parameters o Object the object to be ...