String variable interpolation Java [duplicate]
If you’re using Java 5 or higher, you can use String.format:
java
Java JDK – possible lossy conversion from double to int
When you convert double to int,the precision of the value is lost. For example, When you convert 4.8657 (double) to int.The int value will be 4.Primitive int does not store decimal numbers.So you will lose 0.8657. In your case,0.7 is a double value(floating point treated as double by default unless mentioned as float-0.7f). When you calculate price*much*0.7 ,the answer is a double … Read more
Print ArrayList
I have an ArrayList that contains Address objects. How do I print the values of this ArrayList, meaning I am printing out the contents of the Array, in this case numbers. I can only get it to print out the actual memory address of the array with this code:
Non-static variable cannot be referenced from a static context
I’ve written this test code: But it gives the following error: How do I get my methods to recognize my class variables?
How change the color arrowIcon to JMenu when it is selected
when i mouse-over it, it loses the color that i have set for it. This is because MetalTheme of MetalLookAndFeel ignores BasicLookAndFeel color settings as follows. To change the selection foreground color of the menu arrow icon, you might need to change MetalTheme or set your ownMenuArrowIcon:
What does “?” mean in Java? [duplicate]
someval = (min >= 2) ? 2 : 1; This is called ternary operator, which can be used as if-else. this is equivalent to Follow this tutorial for more info and usage.
Running JAR file on Windows 10
I have made a Jar file, but I cant make it to run by double clicking.It works fine using java -jar name.jar or by making a batch file.I have already reinstalled jdk1.8.0_102, set the JAVA_HOME variable and javaw.exe in the jre folder is already the default program to run it.so how do I make it to run by double clicking?
Java compile error: “reached end of file while parsing }”
I have the following source code When I try to compile it I get the following error: What am I doing wrong? Any help appreciated.
How to split a String by space
What you have should work. If, however, the spaces provided are defaulting to… something else? You can use the whitespace regex: This will cause any number of consecutive spaces to split your string into tokens.
Does a Java to C++ converter/tool exist?
It’s possible to do anything given enough time, money and resources. Is it practical? Beyond trivial examples not really. Or rather it depends on what constitutes an acceptable error rate. The real problem is that the idioms are different in Java to C++. Java to C# for example would actually be far easier (because the … Read more