Class Method Which Take String And Returns A String In Reversed Version

Dec 16, 2014

i am trying to write a class method which will take in a string and returns a string which is the reversed version of that string. it compiles fine but when i try to run it it states Main method not found in class StringReverse,please define the main method as public static void main(String[]args). I am new to java and cannot figure out

import javax.swing.JOptionPane;
public class StringReverse {
public String reverseString(String str){
JOptionPane.showInputDialog(null,"Please enter word");
char c = str.charAt(str.length()-1);
if(str.length() == 1) return Character.toString(c);
return c + reverseString(str.substring(0,str.length()-1));}}

View Replies


ADVERTISEMENT

Write A Method That Returns Unicode Values Of A String?

Oct 25, 2014

I must write a method that accepts a string and returns an int. The method should sum the unicode values of each character, so the string "ABC" should return 198. Also the only string class methods I'm aloud to use are length, charAt, and substring. I just don't know how the get the Unicode value.

View Replies View Related

Implementing CompareTo Method Of String Class

Apr 26, 2015

I've tried implementing the compareTo method in several ways and no luck.. I keep getting errors and now it just says bad operand type for binary operator with the ">" symbol and also the less than. I'm attempting to give an implementation for the compareTo method so it compares the value of the requestDate instance variable of the two objects. if the calling object of request is greater then I have to return ""1" if it's smaller then returns "-1" and if they are the same then returns value of "0"

package librarysystem_phase2;
import java.io.Serializable;
/**
* This class represents a request a member makes to checkout or download an item from the library.
*/
public class Request implements Serializable, Comparable<Request>

[code]....

View Replies View Related

How To Call String From Main Method In Different Class

Dec 9, 2014

The following code is located in my main class called InjectionFix. I have another class where I need to call or initiate the string in the code below. How can I achieve this. I tried to create an Object of the class but I cant do this because my other class doesnt contain a main method.How can I get the other class to initiate the code below which is loacted in my main class.
 
public static String escapeDN(String name) {
  StringBuilder sb = new StringBuilder();
  // space or # character at the beginning of a string
  if ((name.length() > 0) &&
        ((name.charAt(0) == ' ') ||
             (name.charAt(0) == '#'))) {

[Code] .....

View Replies View Related

Method Creation - Take A String With Duplicate Letters And Return Same String Without Duplicates

Nov 7, 2014

How can I write a method that takes a string with duplicates letters and returns the same string which does not contain duplicates. For example, if you pass it radar, it will return rad. Also i would like to know how can I Write a method that takes as parameters the secret word and the good guesses and returns a string that is the secretword but has dashes in the places where the player has not yet guessed that letter. For example, if the secret word is radar and the player has already guessed the good guesses letters r and d, the method will return r-d-r.

View Replies View Related

String Split Method To Tokenize String Of Characters Inputted?

Sep 27, 2014

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) {

[Code] .....

View Replies View Related

String Declaration - Check A / B Returns False

Jan 30, 2014

I have doubts in string declaration. As I know we can declare string in two ways:

1. String a=new String("Hello");
2. String b="Hello";

What is exact difference between them? Another thing is when I check (a==b) it retuns me false, but when I check a.equals(b) it returns me with true. Why So?

View Replies View Related

Alert Returns Added String Instead Of Adding Var Together

Jan 28, 2014

The following alert returns an added string instead of adding the var together to give me a total?

var tvHours = prompt('How many hours of Tv do you watch last week?');
var webHours = prompt('How many hours of internet surfing did you do last week?');
var gameHours = prompt('How many hours of video games did you play last week?');
alert(tvHours + webHours + gameHours);

Also can you store a var in an alert? e.g ( var time = alert(tvHours + webHours + gameHours); ???

View Replies View Related

Servlets :: JSessionID Cookie Value - It Always Returns Empty String

Feb 6, 2014

I'm trying to get the jsessionid cookie value using the following line in my jsp. It always returns empty string. Is this correct behaviour?

response.encodeURL("")

View Replies View Related

EJB / EE :: Create Stateless Bean That Instead Of Returning A String Returns Object

Jul 31, 2014

I'm training myself with the EJB 3 technology. I would like to create a stateless bean that instead of returning a String, it returns an object. I tried in the same way I did with the first exercise, but I'm getting several errors.

View Replies View Related

Accepting String And String Array In Just ONE Method?

Mar 18, 2014

Code a Java method that accepts a String array and a String. The method should return true if the string can be found as an element of the array and false otherwise. Test your method by calling it from the main method which supplies its two parameters (no user input required). Use an array initialiser list to initialise the array you pass. Test thoroughly.

public class test {
public static void main(String[] args) {
Printhelloworld();
String[] verbs = {"go", "do", "some", "homework"};
printArrays(verbs);

[Code] .....

View Replies View Related

String Split Method To String Array

Sep 21, 2014

So I'm creating a class which when given three inputs uses them as sides of a triangle and tells ther user what type of triangle it is, or if the input is invalid, tells them why it is invalid. I'm readin the input as a string and then trying to split it into a string array, from there checking to see if it has 3 elements.. in which the data is good at that point, and then converting them to ints and checking to see if they're negative ansd finally checking to see if they can work as sides of a triangle ie a+b >c, a+c >b , b+c >a.

I'm trying to split it into an array of strings but am getting an error, and can't seem to figure out why as this should be working from what I've read of the string.split method online.

import java.util.*;
public class TriangleTest{
private int sideA;
private int sideB;
private int sideC;
public static void main(String[] args){
TriangleTest triangle = new TriangleTest("3 4 5");

[Code] ....

The output reads [Ljava.lang.String;@15db9742

View Replies View Related

Returns Area Of Triangle / Unless Triangle Not Value So Return String?

Dec 28, 2014

I'm doing a problem where the area of a triangle is returned (if valid). However, I want to return a message (i.e. 'triangle is not valid) if the triangle is invalid.

I'm not sure how to go about to doing this as my method (called area) will only let me return doubles. Possible to return a string in an else within my area method?

public class MyTriangle {
public static void main(String[] args) {
//triangle is valid if the sum of any two sides is bigger than the third
System.out.println(isValid(3, 4, 5));
System.out.println(area(543, 4, 5));

[Code] ...

View Replies View Related

App That Declares A Class Person (String Name / Int Age) And Account Class?

Mar 31, 2014

I want to write an app that declares a class Person(String name, int age), and an Account class, Account(int code, double balance).But, additionally, every Person has at most 3 accounts, and each account has a Peron associated with it.

my code so far...

public class Person {
private String name;
private int age;
private Account[] accounts;
private int numOfAccounts;
public Person(String name,int age){
this.name=name;

[code]....

My problem is:When I make data input for a person, and additionally I want to read data for the account(s) that this rerson has, what code should I write to create a new Account object as account[numOfAccounts].And, what is the code to assign an owner to a new created Account object?

There exists a relationship between the two classes, but I cannot find the way to implement this relation....

View Replies View Related

Writing A Method That Returns Words Without Four Letters Back To Main Method

May 27, 2014

I have to write a method called censor that gets an array of strings from the user as an argument and then returns an array of strings that contains all of the original strings in the same order except those with length of 4. For example if cat, dog, moose, lazy, with was entered, then it would return the exact same thing except for the words with and lazy.

Currently, my code so far just prints [Ljava.lang.String;@38cfdf and im stuck.

import java.util.Scanner;
 public class censorProgram {
public static void main (String args[]){
Scanner input = new Scanner (System.in);
System.out.println ("How many words would you like to enter?");
int lineOfText = input.nextInt();
 
[Code] ....

I have to make new string array in the method and return words without four letters in the main method

View Replies View Related

String Not Being Passed Into Method?

Oct 20, 2014

The only problem I am having is I cannot get my string plainText to go through the encode and prepareString methods.

Is there something in my methods that is wrong, or is it the way that I am calling them?

What is happening is if I enter "this is a test" as a plainText I am getting the samething back with no changes.

View Replies View Related

Sort String Method

Aug 7, 2014

I am getting incombatable types, I do not know why I am getting them..why I am getting the error?

The Error I am getting:
stringSort.java:26: error: incompatible types
if(myArray[j].compareToIgnoreCase(myArray[i].toString())){
^
required: boolean
found: int
*/

[code]....

View Replies View Related

Calling A String To Another Method

Oct 23, 2014

I need to get the string encodedString from the method encode able to be used in the decode method.

Java Code:

public String encode(String plainText) {
int prepareString;
int shiftChar;
String preparedString2 = prepareString(plainText);
String encodedString = "";
for(int c = 0 ; c < preparedString2.length();c++)

[Code] ....

View Replies View Related

String Intern Method

Oct 15, 2014

I understand that the intern() method is to be used when you create Strings using the new operator and you want the 2 strings to be the same object. But in that case, why can't we just enclose the 2 strings in double quotes instead of using the new operator

View Replies View Related

How To Make A Method Splitting A String

Jan 14, 2014

How do I make a method that can seperate parts of a String. The String is [name,aid]... example [John,5],

I want to remove [ , and ] from the String... How can I do this?

This is what i've done this far:

static public String splitta(String tf)
{
String part1 = "";
String part2 = "";
String part11 = "";
String part22 = "";
String part111 = "";
String part222 = "";
String[] parts = new String[2];

[Code] ....

This dosn't work, it wont compile... It states the following:

Exception in thread "AWT-EventQueue-0" java.lang.ArrayIndexOutOfBoundsException: 1
at testprojekt.Validering.splitta(Validering.java:130)

View Replies View Related

Method For Counting Vowels In A String

Nov 21, 2014

I have to take a user's input and count the number of vowels in a String. If I start with a lowercase vowel it gets counted, but if I start with an uppercase or different letter I get nothing. Either way, I can not get the counter to go higher than 1.

import java.util.Scanner;
public class countVowels
{
public static void main(String[] args)
{
Scanner kb=new Scanner(System.in);
System.out.println("Enter a sequence of letters:");
String letters=kb.next();

[code]...

View Replies View Related

Using Split Method To Reverse A String

Oct 19, 2014

In this exercise, create a program that asks a user for a phrase, then returns the phrase with the words in reverse order. Use the String class's .split() method for this.

Example input
The rain in Spain falls mainly on the plain

Example output
plain the on mainly falls Spain in rain The

While I understand the assignment, nowhere in the text is it covered how to reverse the order of the words in the string. I understand using the .split method, but not for this exercise.

Here is my code so far.

import java.util.*;
/**
* Java class SplitString
* This program asks for a phrase, and the code allows the phase to return in reverse order.
*/

public class SplitString {
public static void main (String[] args){
//set phrase input and mixed which will be the result

[Code] ....

As you can see, I have been googling this method and have come up nearly empty. My text does not cover the .reverse() method. The only thing it covers with .split() is how to split a string. I also tried StringBuilder with no success.

View Replies View Related

How Many Objects Created With New String Method

May 22, 2014

I am little confused about String creation in java.

Doubt 1: How String objects assigned to Pool area:

1. String s="in pool";
2. String s1= new String("not in pool");

How many objects created in statement 1 and 2. According to recent discussion with my colleague, one object created in String pool in case 1. And in case 2, two objects are created, one as literal goes to String pool and other with new() opr goes to Heap.

If above is correct, Ain't we wasting double memory for same object ? Really need clear understanding on this

Doubt 2: How does intern() work: Please see if my below explanation is correct

1. If String literal is already present in String pool , and i create a same string with new operator, reference to object is changed to pool area.

2. If String object is created using new operator and intern is called on it. If same string object is not present in the String Pool, Its moved to String pool and reference to this in Pool is returned.

View Replies View Related

Creating Enum With String And Method

Nov 9, 2014

How would I go about and make an enum, that has Strings and Methods?I want to make a class called GraphicalEffects, this class and be instanstiated and it has a method to apply graphicalEffects AS methods or some type of references to methods in an ArrayList.

View Replies View Related

String Buffer Append Method

Feb 17, 2014

I have the following code which always gives me java heap space error because of line number 65 due to string buffer append method in this line, I don't know why?

/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
import samy.*;
import java.util.Scanner;
public class InfixToPostfix {
OrderedList list = new OrderedList();
Scanner input = new Scanner(System.in);
public StringBuffer postfix = new StringBuffer();

[Code] .....

View Replies View Related

String Method To Return A Double

Jul 11, 2014

I'm having an issue with figuring out how to structure and call a method using a string prompt. My prof has given us specific methods to create, and the one I'm having issues with is blic static double getOperand(String prompt). What I have currently is this:

public static double getOperand(String operand1, String operand2){
Scanner input = new Scanner(System.in);
System.out.println("What is the first operand?");
operand1 = input.toString();

System.out.println("What is the second operand?");
operand2 = input.toString();
return operand1, operand2;
}

which is obviously not working. When I asked my prof he sent me this, "The String paramater in the getOperand() method is intended to have the prompt value that is passed to it. Within the method, the prompt is then displayed, what the prompt is asking for is input, and then returned to the method call.For example, if the method is public double getOperand(String prompt) within the method you would display the prompt, as in System. out. println(prompt), use the Scanner class to create an object, perhaps called input, and then use the input object to get the value asked for by the prompt. Once you have that value, which in this example would be a double, then return the value to the method that called it.

The call could be something like this: double value = getOperand("What is the first operand?");". But that only works a little. Clearly I'm missing something and no matter what I google, or how many times I read the chapter, I am just not getting this. Everything else up to this point has been easy. and I can create regular methods just fine, the menu method works, but I can't figure out this string method and all the rest build off this method.

View Replies View Related







Copyrights 2005-15 www.BigResource.com, All rights reserved