stringtokenizer | 易学教程

how to read two consecutive commas from .csv file format as unique value in java

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问题 Suppose csv file contains 1,112,,ASIF Following code eliminates the null value in between two consecutive commas. Code provided is more than it is required String p1=null, p2=null; while ((lineData = Buffreadr.readLine()) != null) { row = new Vector(); int i=0; StringTokenizer st = new StringTokenizer(lineData, ","); while(st.hasMoreTokens()) { row.addElement(st.nextElement()); if (row.get(i).toString().startsWith("\"")==true) { while(row.get(i).toString().endsWith("\"")==false) { p1= row.get

Ignore parentheses with string tokenizer?

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问题 I have an input that looks like: (0 0 0) I would like to ignore the parenthesis and only add the numbers, in this case 0, to an arraylist. I am using scanner to read from a file and this is what I have so far transitionInput = data.nextLine(); st = new StringTokenizer(transitionInput,"()", true); while (st.hasMoreTokens()) { transition.add(st.nextToken(",")); } However, the output looks like this [(0 0 0)] I would like to ignore the parentheses 回答1: You are first using () as delimiters, then

StringTokenizer and String split - split on special character

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问题 I have the string: 2|HOME ELECTRONICS| |0|0| | | | |0| | I want to separate all tokens delimited by | in the above string. I tried to tokenize it with StringTokenizer but it doesn't consider space as a token. Also, I tried split("|") but it gives each character of the above string as elements in returned string array. What should I do? 回答1: Try string.split("\\|"); | is a special character and must be espaced with escape character \ . In Java \ is written as \\ . That is because String#split(

I want to search for a string using StringTokenizer but the string I'm looking for has a delimiter in it - Java

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问题 I have an external file named quotes.txt and I'll show you some contents of the file: 1 Everybody's always telling me one thing and out the other. 2 I love criticism just so long as it's unqualified praise. 3 The difference between 'involvement' and 'commitment' is like an eggs-and-ham breakfast: the chicken was 'involved' - the pig was 'committed'. I used this: StringTokenizer str = new StringTokenizer(line, " .'"); This is the code for the searching: String line = ""; boolean wordFound =

how does the String.Split method determine separator precedence when passed multiple multi-character separators?

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问题 If you have this code: "......".Split(new String[]{"...", ".."}, StringSplitOptions.None); The resulting array elements are: 1. "" 2. "" 3. "" Now if you reverse the order of the separators, "......".Split(new String[]{"..", "..."}, StringSplitOptions.None); The resulting array elements are: 1. "" 2. "" 3. "" 4. "" From these 2 examples I feel inclined to conclude that the Split method recursively tokenizes as it goes through each element of the array from left to right. However, once we

Using StringTokenizer in Coverting words to number

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问题 Can anyone please help me on how to convert words into numbers in Java programming, using string tokenizer. Your answer will be highly appreciated. EDITED : I already made this code . but there is an error . like when i input one thousand one hundred , the program outputs 100100 . need your help guys . what do you think is the problem with my program and also what should i do . thanks alot .. import javax.swing.*; import java.util.*; import java.text.*; public class convertwordstonumbers {

String 的 split、subString，外加StringTokenizer之性能比较

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【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> 最近在阅读java.lang下的源码，读到String时，突然想起面试的时候曾经被人问过：都知道在大数据量情况下，使用String的split截取字符串效率很低，有想过用其他的方法替代吗？用什么替代？我当时的回答很斩钉截铁：没有。 google了一下，发现有2中替代方法，于是在这里我将对这三种方式进行测试。测试的软件环境为：Windows XP、eclipse、JDK1.6。测试用例使用类ip形式的字符串，即3位一组，使用”.”间隔。数据分别使用：5组、10组、100组、1000组、10000组、100000组。实现闲话不说，先上代码： 1 package test . java . lang . ref ; 2 3 import java.util.Random ; 4 import java.util.StringTokenizer ; 5 6 /** 7 * String测试类 8 * @author xiaori.Liu 9 * 10 */ 11 public class StringTest { 12 13 public static void main ( String args []){ 14 String orginStr = getOriginStr ( 10 ); 15 16 ///

populate a 'JTable' with values from a '.txt' file

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问题 I'm new to java and I have a text file like this 0786160384|P. K.|Tharindu|912921549v|Colombo| 0711495765|P. K.|Gamini|657414589v|Colombo| 0114756199|H. P.|Weerasigha|657895478v|Kandy| I want to populate my 'jTable' with with the data from this text file. below is my code so far which doesn't work. When I execute the program nothing is displayed on the table. private void formWindowOpened(java.awt.event.WindowEvent evt) { String line = null; DefaultTableModel dtm = (DefaultTableModel)

StringTokenizer delimiters for each Character

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问题 I've got a string that I'm supposed to use StringTokenizer on for a course. I've got my plan on how to implement the project, but I cannot find any reference as to how I will make the delimiter each character. Basically, a String such as "Hippo Campus is a party place" I need to divide into tokens for each character and then compare them to a set of values and swap out a particular one with another. I know how to do everything else, but what the delimiter would be for separating each

Using string tokenizer to set create arrays out of a text file?

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问题 Hey. You may have recently seen a post by me looking for help, but I did it wrong before, so I am going to start fresh and begin at the basics. I am trying to read a text file that looks like this: FTFFFTTFFTFT 3054 FTFFFTTFFTFT 4674 FTFTFFTTTFTF ... etc What I need to do is put the first line into a String as the answer key. Next, I need to create an array with the student ID (the first numbers). Then, I need to create an array that is parallel to the student ID that contains the student's