arraylist

Sorting an arraylist based on objects value in another arraylist in Java

由 不想你离开。 提交于 2019-12-24 01:00:01
问题 I have an issue with sorting an Array List. In a class i have two Array Lists of different objects, we can call the objects Foo and Bar. public class Foo() { int value; //Some other fields, and setters and getters. } public class Bar() { int id; //Same here... } So the list fooList can be totally scrambeled. Say that i have 16 Foos, but Foo with value 5 can be on index 13 and so on. What i'm trying to do is to order barList to match fooList after these values. If Foo with value 5 is on index

ArrayList with Arrays

由 三世轮回 提交于 2019-12-24 00:48:02
问题 It seems that more "complex" ArrayLists are not widely used, since I'm unable to find any concrete, helpful info about it. I'm trying to create an ArrayList of Arrays (and eventually an ArrayList of ArrayLists of Arrays), but I seem unable to either add Arrays to the ArrayList, or access the Array's elements. All this is done using VBScript in QTP. (The code reads from an Excel file, which is working fine.) Set my_sheet = ExcelObject.sheets.item(testCaseSheet) testCase = CreateObject("System

Vb Net check if arrayList contains a substring

由 笑着哭i 提交于 2019-12-24 00:43:23
问题 I am using myArrayList.Contains(myString) and myArrayList.IndexOf(myString) to check if arrayList contains provided string and get its index respectively. But, How could I check if contains a substring? Dim myArrayList as New ArrayList() myArrayList.add("sub1;sub2") myArrayList.add("sub3;sub4") so, something like, myArrayList.Contains("sub3") should return True 回答1: Well you could use the ArrayList to search for substrings with Dim result = myArrayList.ToArray().Any(Function(x) x.ToString()

PDFLib set_graphics_option how to pass list of colors in fillcolor option

由 五迷三道 提交于 2019-12-24 00:38:56
问题 How to pass multiple PANTONE Colors list to PDF library set_graphics_option function? optList = "fillcolor={spotname {PANTONE 281 U} 1}"; p.set_graphics_option(optlist); 回答1: How to pass multiple PANTONE Color set to PDF library set_graphics_option function? Maybe I don't get your question yet, but you can only have one color set at a time. When you want to fill some content with a different color, you have to set the (fill|stroke)color accordingly. When you want to the stoke and fill color

Sort ArrayList of Objects by Specific Element

由 谁说我不能喝 提交于 2019-12-24 00:38:43
问题 I have several arraylists which each contain player data for a specific team. Each object contains the following elements in order; Jersey Number, First Name, Last Name, Preferred Position, Goals, Assists. The user decides whether to view the data by goals or assists, and then the data is displayed in descending order. Goals and assists are both of int data type. I will be able to display the data fine but what I am stuck on is how to sort the arrayList by one of these specific stats. Because

adding and subtracting for BODMAS system

由 ＊爱你＆永不变心＊ 提交于 2019-12-23 23:38:18
问题 I have been building a simple formula calculator and have gotten stuck with addition and subtraction. As you should know, when calculating an equation, you follow the arithmetic rules of precedence, i.e. brackets, order: power functions, division, multiplication, addition and subtraction . The problem is that addition and subtraction are given equal priority, so therefore you can read it from left to right. Here is my code so far: { ArrayList<String> equation = java.util.Arrays.asList({"2","-

org.datanucleus.sco.backed.ArrayList cannot be cast to java.util.Set

由 时光怂恿深爱的人放手 提交于 2019-12-23 23:32:56
问题 Since 4 days ago, in random short periods of time , my deployed application is throwing this error: org.datanucleus.sco.backed.ArrayList cannot be cast to java.util.Set We are using GWT 2.4 / Java 1.7 (We recently migrate from 1.6 to 1.7) It happens when retrieving or persisting an entity with a String set: import java.util.HashSet; import java.util.Set; ... @PersistenceCapable(identityType = IdentityType.APPLICATION, detachable = "true") public class DbAccount { @PrimaryKey @Persistent

Fixed SubList Count but Dynamic Members in Java

由 情到浓时终转凉″ 提交于 2019-12-23 23:29:59
问题 I have the following Integer list List<Integer> arrayList = new ArrayList<Integer>(); for (int i = 0; i < 7; i++) { arrayList.add(i); } So the list is like this [0,1,2,3,4,5,6]. My scenario is If I give the value = 5 as parameter then I would like to split 5 sub list like this [0,5], [1,6] , [2], [3], [4] If I give the value = 4 as parameter then I would like to split 4 sub list like this [0,4], [1,5], [2,6] , [3] If I give the value = 3 as parameter then I would like to split 3 sub list like

java.util.ConcurrentModificationException 异常问题详解

由 ◇◆丶佛笑我妖孽 提交于 2019-12-23 22:38:03
环境：JDK 1.8.0_111 在Java开发过程中，使用iterator遍历集合的同时对集合进行修改就会出现java.util.ConcurrentModificationException异常，本文就以ArrayList为例去理解和解决这种异常。 一、单线程情况下问题分析及解决方案 1.1 问题复现 先上一段抛异常的代码。 1 public void test1() { 2 ArrayList<Integer> arrayList = new ArrayList<>(); 3 for (int i = 0; i < 20; i++) { 4 arrayList.add(Integer.valueOf(i)); 5 } 6 7 // 复现方法一 8 Iterator<Integer> iterator = arrayList.iterator(); 9 while (iterator.hasNext()) { 10 Integer integer = iterator.next(); 11 if (integer.intValue() == 5) { 12 arrayList.remove(integer); 13 } 14 } 15 16 // 复现方法二 17 iterator = arrayList.iterator(); 18 for (Integer value :

c# Get object property from ArrayList

由 a 夏天 提交于 2019-12-23 22:10:05
问题 Can't figure this one out I have an ArrayList of classes: // Holds an image public class productImage { public int imageID; public string imageURL; public DateTime dateAdded; public string slideTitle; public string slideDescrip; } public ArrayList productImages = new ArrayList(); productImage newImage = new productImage(); newImage.imageID = 123; productImages.Add(newImage); Now how do I access the property? int something = productImages[0].imageID Doesn't work! Error 1 'object' does not
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