Tokenize A String - Removing Numeric From A TreeSet
Nov 23, 2014
I am using a TreeSet to tokenize a string. The output is sorted with numeric first followed by words
E.g. 13 26 45 and before etc.....................
Is there a tidy way to remove the numeric?
Last bit of my code is :-
// print the words separating them with a space
for(String word : words) {
System.out.print(word + " ");
}
} catch (FileNotFoundException fnfe) {
System.err.println("Cannot read the input file - pass a valid file name");
}
I want to remove all numeric number in String text
String text = She was born in 1964,and now her age is 55; String delim = ","; StringTokenizer stringTok = new StringTokenizer(text, delim); String f1 = "%-40s"; String h1 = String.format(f1, "Token list");
I am currently trying to make a calculator in Java. I want to use the String split method to tokenize the string of characters inputted. I thought I was using the String split method wrongly, because I had surrounded the characters I wanted to delimit with square brackets. However, when I removed the square brackets, the code threw an exception when I pressed the equal button. The exception was a PatternSyntaxException exception. Am I using the String split method wrongly? And why is the exception thrown? Here is my code:
import javax.swing.*;//import the packages needed for gui import java.awt.*; import java.awt.event.*; import java.util.Arrays; import java.util.List; import static java.lang.Math.*; public class CalculatorCopy { public static void main(String[] args) {
I have a string value returned from a background tool that will range from 0 to possibly terabytes as a full number. I want to format that number to use commas and to reduce the character count using an appropriate size modifier (KiB, MiB, GiB, etc). I've tried converting the string number to a Double value using Double.parseDouble() and then performing the math based on the size of the value with this code:
At first I wanted to just use an array and set each day a value, however I was told that it has to be stored as a string.
Design and implement the class Day that implements the day of the week in a program. The class Day should store the day, such as Sun for Sunday. The program should be able to perform the following operations on an object of type Day:
A. Set the day. B. Print the day. C. Return the day. D. Return the next day. E. Return the previous day. F. Calculate and return the day by adding certain days to the current day. For example, if the current day is Monday and we add four days, the day to be returned is Friday. Similarly, if today is Tuesday and we add 13 days, the day to be returned is Monday. G. Add the appropriate constructors. H. Write the definitions of the methods to implement the operations for the class Day, as defined in A through G. I. Write a program to test various operations on the class Day.
import java.util.*; public class Day { static Scanner readinput = new Scanner(System.in); String day; public Day(String day) {
[Code] ....
So right now if I run my code it allows me to type in a day, then it gives me the next and previous day, the last part is to add X days to it. Ideally I would like to be able to take the day entered, depending on the day set a numeric value, then add prompt for number of days you want to add. The program should then use modal (%7 ) to add value to the value that was given based on the day, and then translate it back into a String value (the day).
I just need to write a simple program/function that replaces certain letters from a string (i.e. censor( "college", "aeiou" ) returns "cllg"). I'm trying to get the code right first, and then write a function for it.I basically just thought that I would iterate over the first string, and once I had the first character, I would then iterate over the second string, to see if the character exists. I'm getting a "dead code" error on my second loop because I put the second "break."
public class ap { public static void main(String [] args){ String s = "Hello"; String s2 = "aeiou";
So basically, if a line in a text file contains a certain string, that specific line will be deleted. It should probably be similair to this method?
Java Code:
/** * Replace text. * @param replace * The text to replace. * @param replaceWith * The text to replace with. */ public static void replaceSelected(String replace, String replaceWith) { try { BufferedReader file = new BufferedReader(new FileReader("data/replacer.txt"));
Question 1: I am working on an assignment where I have to remove an item from a String array (see code below). When I try to remove an item after entering it I get the following error "java.lang.NullPointerException." I am not sure how to correct this error.
Question 2: In addition, I am having trouble figuring out how to count the number of occurrences of each string in the array and print the counts. I've been looking at other posts but they are more advanced and I have not yet learned how to use some of the tools they are referring to.
private void removeFlower(String flowerPack[]) { // TODO: Remove a flower that is specified by the user Scanner input=new Scanner(System.in); System.out.println(); System.out.println("Please enter the name of the flower you would like to remove:
public void createPersons() { Random rand = new Random(); for(int index = 0; index < persons.length; index++) { Person person = new Person(rand.nextInt(maxAge), persons[index]); setOfPersons.add(person);
[Code] ....
setOfPersons is a TreeSet, persons[] is an array of strings that contains 10 names. Why printPersons() prints only the half names of setOfPersons?
public class Person implements Comparable<Person> { // the age of the person private int age; //the name of the person private String name; //the Integer object to wrap the age value; private Integer ageWrap;
[Code] .....
The collection library has a class named TreeSet, which is an example of a sorted set. Elements in this set are kept in order. Carefully read the description of this class, and then write a class Person that can be inserted into a TreeSet, which will then sort the Person objects by age.
This is the exercise I am trying to solve. And this is as far as I have gotten to. Is it possible to sort my setOfPersons TreeSet directly? I tried to use
Collections.sort(setOfPersons)
method but it wont compile, and I realized that it is not applicable to TreeSet. So I made the
sortByAge()
method to do it indirectly...
I am puzzled though because in the exercise it states
write a class Person that can be inserted into a TreeSet, which will then sort the Person objects by age.
meaning that the TreeSet will sort the Person Objects and not my class..
What is the difference between HashSet, TreeSet and LinkedHashSet?.One difference between HashSet and TreeSet is that TreeSet is sorted, whereas HashSet is not sorted. I dont know the other differences
I feel like the program is written correctly; however, the interactions pane in DoctorJava gives me numbers instead of letters. I am happy that the numbers it gives me is consistent, but it still bothers me and I do not know what to debug.
import java.util.Scanner; public class Monogram { public static void main(String[] args) { Scanner input = new Scanner(System.in); String firstName, middleName, lastName; int nameLength=1;
I am trying to sort a JTable on an all numeric (integer) column. From what I read, if the sorter knows the type is integer it should sort correctly. This is my code:
public class ActorTableModel extends DefaultTableModel { private static final long serialVersionUID = 1005352603826663105L; public ActorTableModel (Object data[][],Object columnNames[]) { super(data,columnNames); } public Class<?> getColumnClass (int column) { if (column==0) { return(Integer.class); } return(String.class); } }
The result is when I sort on that column (0), it sorts alphabetically not numerically.
I am trying to write out a program that takes numerical input from the user and converts it to a date using the English month name. I am experimenting with the method of a "switch" statement without using the "break" clause. However, I seem to be missing something, as Eclipse is telling me I have a syntax error with my block. My curly braces seem properly placed. Also, I made sure to follow guidelines to make my code fit on the screen and remain easy to read.
import acm.program.*; public class MethodsThatReturnNonNumericValues extends ConsoleProgram { public void run() { int month=readInt("Enter month number"); int day=readInt("Enter day"); int year=readInt("Enter year");
I am trying to read numeric values from a text file into an array. This is what i have so far but when i compile it, it doesn't run and give me a result.
import java.io.File; import java.io.FileNotFoundException; import java.io.IOException; import java.io.PrintWriter; import java.util.Scanner; public class question2_17110538 {
So I have to convert strings to double numbers and there can be no exception.
The strings that aren't numbers or do not fit into a set criteria have to be discarded.
When I try to write this I get an exception when a non-numeric is entered and the code stops.
What can I do? Also, am I finding the average of the array correctly?
import java.util.*; public class Grades{ public static void main(String args[]){ int arraycount = 0; final int SIZE = 10; int validArraycount = 0; final int ValidArraySize = 10;
I have a problem about this numeric or value error on my java class. Whenever I am calling for the procedure in callable statement it says that error. I don't know what is the problem with my sql code because I;ve tried running it on database alone and it runs perfectly. The results that I need came out fine. But when I'm already calling it in java that error appears. But I tried on finding the line that the said error is coming from and here is the code...
create or replace PROCEDURE RENTING (P_NNAME IN VARCHAR2, P_ADD IN VARCHAR2, P_PHONE IN NUMBER,
In the test program, you will need to convert the Strings for quantity and price to numeric types. To do this, you could use the Integer.parseInt() method and the Double.parseDouble() methods. I'm not sure what he means by that. I attempted it in my program but I get these errors
Exception in thread "main" java.lang.Error: Unresolved compilation problems: number cannot be resolved to a variable description cannot be resolved to a variable quantity cannot be resolved to a variable price cannot be resolved to a variable Duplicate local variable quantity Duplicate local variable price Syntax error on token "myInvoice", delete this token The method getinvoiceAmount() is undefined for the type String
at InvoiceTest.main(InvoiceTest.java:7)
Code:
public class Invoice { private String number; //Instance variables private String description;//Instance variables private int quantity;//Instance variables private double price;//Instance variables
