compareto

问题 public class Item implements Comparable { private String name, category; private int quantity; private double price; public Item(String nam,String cate,int quant,double pric) { name = nam; category = cate; quantity = quant; price = pric; } public String toString() { return name + ", " + category + ", " + quantity + ", " + price; } public boolean equals(Object other) { if (price == ((Item)other).getPrice()) return true; else return false; } public String getName() { return name; } public

问题 I am trying to sort an Android ListView object. I am currently using the following code: // Sort terms alphabetically, ignoring case adapter.sort(new Comparator<String>() { public int compare(String object1, String object2) { return object1.compareToIgnoreCase(object2); }; This sorts my list, whist ignoring case. However, it would be nice to ignore punctuation as well. For example: c.a.t. car cat should be sorted as follows: car c.a.t. cat (It doesn't actually matter which of the two cats

问题 i am not being able to implemenet Icomparable CompareTo to compare Taxpayer objects based on tax owed ..can someone help me with the icomparable implementatioin of Taxpayer class?? I want to implement the icomparable like here-Interfaces is new topic to me..please help http://www.dotnetperls.com/icomparable using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace Taxes { class Rates { // Create a class named rates that has the following data members:

问题 I've got the following class: //GetHasCode, toString, and equalsTo removed to keep the question simple. private String weaponName; private String weaponType; private int weaponDamage; public WeaponObject(String name, String type, int damage) { this.weaponName = name; this.weaponType = type; this.weaponDamage = damage; } @Override public int compareTo(WeaponObject compare) { int name = this.getWeaponName().compareTo(compare.getWeaponName()); int type = this.getWeaponType().compareTo(compare

问题 In the Java textbook I'm learning from, it says that this uses "lexicographic ordering" to return an integer. I understand how it works, but what is a specific way this is used in programming? 回答1: All of the built-in sorting methods use it when sorting non-primitives 回答2: Let's say you wanted to sort glasses of water, the objects themselves are called Glass . Now let's say that a Glass can have a height and an amount of water that it holds. Now let's say you wanted to compare two Glasses .

问题 What is the working style of compareTo(Object o) method. How the first object of a set is compared? Every time when an object is created the constructor is called and the values are assigned with this for class variables and the same class variables are compared with Object o , but, what is o in this case? 来源： https://stackoverflow.com/questions/39752908/what-is-the-first-current-object-in-compareto-method-in-java-comparable-interf

问题 Hi i'm having trouble implementing the compareTo method. I've looked for answers but nothing has been any help. I'm trying to fill a TreeSet with various sizes of circles. I need compareTo in my circle class to be able to store them this way. import java.util.*; import java.lang.*; abstract class Shape { private String name; //e.g."circlel", "rectangle3" Shape(String name0) { name = name0; } abstract double area (); // area of shape abstract double perim(); // length of perimeter of shape

问题 So I've been given the following problem: Write a program that creates a List of Rationals and sorts them into increasing order. Use appropriate methods from the Collections Framework classes to sort the elements into increasing order. I've created a 'Rational' class to represent rational numbers and I've also made the list of random Rational numbers. But I'm having trouble figuring out a way to implement a method of sorting the list. Here's samples of the code before I go on further: public

问题 I've been reading about using Collator and the compareTo method in String for comparing Strings. I'm unsure what the real difference is between the two from reading the API. When is one to prefer over the other? API Collator API String compareTo 回答1: Promoted from my comment (which sort of half answers the question): Use a collator: Suppose you have a contact manager for a company that has international locations. Suppose you have an autocomplete with prefix matching. The collator can allow

问题 Consider the following code: namespace ConsoleApplication1 { class Program { static void Main(string[] args) { Console.WriteLine(100.CompareTo(200)); // prints -1 Console.WriteLine(((decimal)100).CompareTo((decimal)200)); // prints -1 Console.WriteLine(((short)100).CompareTo((short)200)); // prints -100 Console.WriteLine(((float)100).CompareTo((float)200)); // prints -1 Console.ReadKey(); } } } My question is, are there any specific reasons the CompareTo-method on Int16 returns values other