Assert Statement Check Boolean Expression During Runtime Execution

Mar 5, 2014

An assert statement checks a Boolean expression during run time execution. Is this true?

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Warning While Using Boolean Datatype In Program Execution Success

Oct 26, 2014

I am getting notification about "The value of the local variable result not used" in my program when i am using boolean data type.But code execution was successful. Results are also displayed accurately.I am using Eclipse, there i i have noticed this warning.

* program to practice about comparison operators */
public class compoperators {
public static void main(String[] args) {
boolean result;
}

[code]....

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How To Check Regular Expression

Aug 25, 2014

I have to match pattern like 76XYYXXXX mean x can be 4or 5 and Y can be 6 or 7. All x and y should be same .i.e. 764664444

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Boolean Statement Not Working

Apr 14, 2015

code=Java
import java.util.Random;
import java.util.Scanner;
public final class Derp {
public static int WIN, Tick;
public static Scanner Input = new Scanner(System.in);

[code]...

why this boolean statement isn't working correctly. It's not detecting that the WIN and Tick are the same and instead chooses to always run the second statement.

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Testing Boolean Statement

Mar 30, 2015

I wrote a class for encapsulating coins and I was to do a boolean statement but when I test the statement the results are not showing.Here is the code for my coin class coins.java

package project_3;
/**
*
* @author user a
*/
public class Coins {
private double pennies;
private double nickles ;
private double dimes ;
private double quarters ;
private int dollars ;

[code]...

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Using String And Boolean In If Statement?

May 24, 2015

I want to write a program that ask if you want to go to the movies. If the user type in yes then it'll print out (Alright let go) but if the user type no then it would print (whatever). The trouble that I'm having is. What's the best way to use Boolean and Strings together in a if statement?

public class Night {
static Scanner UserInput = new Scanner (System.in);
public static void main (String [] args){
boolean user1, user2;
user1 = true;
user2 = false;

[Code] ....

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Program Outputting Null Into Validation Statement - Runtime Error

Oct 17, 2014

I am Having trouble with my program to validate. It is outputting null into the validation statement then it brings back a run-time error to that validation Statement for the String.

public String validateData ()
{
if (nm == null)nm = "Error! Must enter at least one character";
else nm = name;
return name;
}//end validation method

Why is this happening, and then once that is completed, why is the validation Sentence in tests Scores not able to validate. I traced it back to out put "Error, a number between 1<100".

public void validateTests ()
{
String testschange;
if (test1 < 0 || test1 > 100) {
testschange = " You have entered an invalid number, between 1-100. Please restart!";
testschange = Integer.toString( test1 ) ;

[Code] .....

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If Statement Requires A Return Of Type Boolean

Dec 6, 2014

Im trying to do this

if( 2/2 ) {
system.out.println( "number is not event" );
} else {
system.out.println( "number is event" );
}

However if statement requires a return of type boolean. So im forced to this instead

if( (2/2) != 0 ) {
system.out.println( "number is not event" );
} else {
system.out.println( "number is event" );
}

Is there a way to achieve the former method, without typecasting, if you had to typecast how do you do it?

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Switch Case Statement - String Expression

Sep 10, 2014

In switch case statement string expression whether it will work or not ???

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Statement Block When While Expression Resolves To True Is Never Executed

May 8, 2014

The statement block when the while expression resolves to true is never executed, no matter what i type in:

String option="hit";
String option2="stay";
String choice = null;
int yTotal = 0;

[Code] .....

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Create A Program That Will Check If One Statement Is Equal To Another

Dec 5, 2014

I'm suppose to create a program that will check if one statement is equal to another but it doesnt display the message if its equal to the inputted String

import java.util.Scanner;
 
public class sup {
public static void main (String args[]) {
Scanner in = new Scanner (System.in);
String one;

[code]...

thats just an example I was able to do it in C++ but it doesnt do what I want in Java

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Check If Height Is A Letter Between A To J - If Statement Always False

Jun 22, 2014

Why isn't heig ever equal to heightShipArray[count] no matter what letter I type in

String[] heightShipArray = {"A", "a", "B", "b", "C", "c", "D", "d", "E",
"e", "F", "f", "G", "g", "H", "h", "I", "i", "J", "j"};
boolean trueHeight = true; // checks if height is a letter between a-j/A-J
do {
Terminal.printLine("Input height with letters A to J");

[Code] ...

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Deprecation In Assert?

Nov 26, 2011

In java it is saying my assertEquals method is deprecated, what does this mean?

I'm trying to make a test method, and its literally crossing out the assertEquals.

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How To Assert A Void Method

Nov 5, 2014

how to assert a void method like shown in the photos,

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Two String Should Be Same But Execution Says Its Not

Feb 16, 2015

public class StringTest
{
public static void main(String args[])
{
String s1="hello";
s1=s1.concat("me");
String s2="hellome";
if(s1==s2) System.out.println("s1 and s2 has same referance");
if(s1.equals(s2)) System.out.println("s1 and s2 has same content");
}
}

Output is : s1 and s2 has same content

if after concatenation both string is stored in string pool it will refer to same memory location and other confusion is after any string operation like (concatenation , replace , substring) jvm creates a new string in which memory area..?? Heap or String pool.

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Execution Of Swing Application On Another PC

Apr 6, 2014

I am writing a Java Swing GUI application on my pc. I have to give this application to my cousin with another pc, where he is not aware of programming. then how can he execute that application? are there any ways of skipping the "javac" and "java" procedures while executing the app on his computer?

I am using win7 x86 and same at my cousin's place. I am also using eclipse-kepler sr1 ide for app development.

Are there any easy ways of automating this "javac" and "java" process(compilation and execution)? something like...scripting?

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Timeout For A Method Execution

Dec 22, 2008

I have a method "doSomething" which can take a while to be fully executed.

...
boolean bResult = false;
bResult = doSomething();
System.out.println("Result:" + bResult);
...

I would like to be able to stop the method execution after 10 seconds and continue the normal execution of my class. This means:

- If doSomething() is executed in 3 seconds for example, the System.out.println() statement shows the result of the method

- If doSomething() is executed in more than 10 seconds, after 10 seconds the method is stopped and the System.out.println() will always have false as result.

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Execution Of Class File

Jan 20, 2015

I have got 2 classes in a source file, 1 real class and 1 test class with main() method. While executing with java command which class name should i write - real class or test class???

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How To Turn If Statement Into A Case / Switch Statement

Jun 19, 2014

So from what iv learnt in Java and programming in general is that using a case statement is far more efficient that using multiple IF statements. I have an multiple IF statements contained within a method of my program, and would like to instead use a case statement.

public String checkPasswordStrength(String passw) {
int strengthCount=0;
String strengthWord = "";
String[] partialRegexChecks = { ".*[a-z]+.*", // lower
".*[A-Z]+.*", // upper
".*[d]+.*", // digits
".*[@#$%!]+.*" // symbols

[code].....

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Swing/AWT/SWT :: Application Just Stop Itself During Execution

May 18, 2014

I made a check4 application with Java.It correctly works but sometimes the application just stop itself during the execution.I never had a problem like this. The application just stop itself and i can't even quit using the closing button..

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Code Won't Compile When Add Extra Execution

Oct 16, 2014

My code runs and compiles just fine when I insert 3 values, however, if I add anymore values NOTHING happens. When I hit the compile button, my mouse pointer turns into that loading circle thing and after 3 seconds it disappears and nothing happens. No error or anything in the console, just BLANK. This problem occurs on line 12 in my main method, and my insert method is on line 41 in the third class..Here is my main method

public class TestAVLTree {
public static void main(String[] args) {
/*test at least 2 diff data types*/
//AVL of ints
AVLTree<Integer> avlInt = new AVLTree<Integer>();
avlInt.insert(100);
avlInt.insert(50);
avlInt.insert(200);
//avlInt.insert(3); fails here. could it be my insert method?
//avlInt.insert(17);

[code]....

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How To Pass Main Arguments On Execution To Swing Component

Aug 4, 2014

I wish to use args passed to main(String[]) during application execution to a Swing component.

In a simple example, assume args passed are: a b c d

And here is the result I look for:

package argsinswing;
import javax.swing.JOptionPane;
public class ArgsInSwing {
public static void main(String[] args) {
String str1 = args[0];

[Code] ....

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JSF :: Execution Of File Upload Primefaces Multiple With Counter

Apr 16, 2015

I am not all secure on the execution of the fileupload Primefaces.

The uploading execution occurs normally, but I would like to have a counter that control's the received files. The problem is that sending files go by so fast by this method that appears to be running in parallel. My question is whether this behavior is normal while sending files.

If it is not, where may be the error. If it is normal what can i do to make the counter really take the right value?

I'm using the scope of the "bean" type of view, but when im trying to run the session the problem also occurs depending on the file size.

If my files are very small, the execution is very fast and I cant follow the counter. If I clean the code the execution usually occurs no matter the size of the files.

@ManagedBean (Name = "bean")
@ViewScoped
public class BeanUpload {
private int counter;
@PostConstruct
public void init () {
counter = 0;

[Code] .....

The result on the console for 3 files is:

COUNTER EX: 1
COUNTER EX: 1
COUNTER EX: 1

If I run the code in debug mode on the console this is the result:

COUNTER EX: 1
COUNTER EX: 2
COUNTER EX: 3

Versions: Mojarra 2.1. Primefaces 5.1.15

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Java Code - Multiple Execution Of Jar File With Different Inputs

Jan 4, 2014

I would like to ask you how can i execute the next code without errors.

I am trying to execute a jar (myFile.jar) file multiple times with different inputs from another jar file. More simple i have game with many players and i create a Round Robin scheduling for the tournament, i need to execute all the mach's of a round together.

When i run the next code it execute on the first game with the first players multiple times.

Java Code:

public class RunJARFile {
//10 player
//5 game per round
public static void main(String[] args) throws IOException {
for (int Tour = 0; Tour < 9 ; Tour++) {
for (int Game = 0; Game < 5; Game++) {

[Code] ....

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Balanced Brackets Execution - Keep Getting Empty Stack Exception

Oct 21, 2014

Im trying to do this program but I keep getting Empty Stack Exception when I execute balancedBrackets. I know that push and pop methods works, but I'm not so sure if my logic for balancedBrackets is correct.

public void push(T t){
if(this.top+1==this.size){
duplicateCapacity();
}
else{
top++;
arr[top]=t;

[Code] .....

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List Iterator Execution - Traversing In Forward Direction

Nov 5, 2014

List<Integer> list = new ArrayList<Integer>();
for (int i = 0; i < 5; i++) {
list.add(i * 3);
}
ListIterator<Integer> listItr = list.listIterator();
System.out.println("Traversing in a forward direction");

[Code] ....

Output:--

Traversing in a forward direction
0 3 6 9 12
Traversing in a backward direction
12 9 6 3 0 425

Why 425 is not showing when we are traversing in a forward direction.

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