Java

Java: Swing application should use operating system theme

When I create a program using Java, the Widget Toolkit "Swing" is used for the GUI. The problem is that you can see that your app has this typical...

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Java: IntToStr - Convert Integer Number to String

I would like to carry out a conversion of an integer number to a string in Java in order to be able to output the number. I know the function...

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Java: Convert String to Integer

Is there any possibility to change or convert a string into an integer value in Java? I have some user inputs that are naturally only available as...

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Java: How to create an Array

What can I do to just create a simple array using the programming language Java? I am coming from other languages and I have tried a lot, but I...

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Java: Integer from String or default Integer as Result

I would like to extract an integer value from some user input. The user input is in string format, but I want to convert it so that the input is...

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Java: Check if String only contains Numbers

Is is there any possibility in Java to determine whether a string only contains numbers (digits from 0 to 9)? I would like to test some user input...

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Computer Expert: To get the look and feel of your operating system in your Java program, you can use the following code right at the beginning of your main: public...

Question | Java: Swing application should use operating system theme

Progger99: Like so often in life, there are several ways to reach your aim. Here are three examples: int i = 123; String s1 = String.valueOf(i); String s2 =...

Question | Java: IntToStr - Convert Integer Number to String

Stefan Trost: You can use the function Integer.parseInt() for that purpose. This function returns an integer value for a given string.  For example: int i =...

Question | Java: Convert String to Integer

Computer Expert: If it is very important for you to use unsigned integers in Java, you can also use an external library such as Guava.This library contains (for...

Question | Java: Declare unsigned Integer

Stefan Trost: In Java, there are several possibilities to create an array.One-Dimensional Arrays Here is an example for an integer array: int[] intArr1 =...

Question | Java: How to create an Array

Progger99: Of course, you can quickly write such a function on your own. It can look like the following (the first parameter is the string, the second parameter...

Question | Java: Integer from String or default Integer as Result