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IllegalMonitorStateException on wait() call

... You need to be in a synchronized block in order for Object.wait() to work. Also, I recommend looking at the concurrency packages instead of the old school threading packages. They are safer and way easier to work with. Happy coding. EDIT I assumed you meant Obje...
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Why 0 is true but false is 1 in the shell?

...l kinds of information about the failure - why it happened, how to fix it, etc. Having zero mean 'success' and non-zero mean failure lets you can check pretty easily for success, and investigate the particular error for more details if you want to. A lot of APIs and frameworks have a similar conve...
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Is there a Max function in SQL Server that takes two values like Math.Max in .NET?

... isnull(@val2,@val1) end ... and you would call it like so ... SELECT o.OrderId, dbo.InlineMax(o.NegotiatedPrice, o.SuggestedPrice) FROM Order o share | improve this answer | ...
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dynamically add and remove view to viewpager

...nds PagerAdapter { // This holds all the currently displayable views, in order from left to right. private ArrayList<View> views = new ArrayList<View>(); //----------------------------------------------------------------------------- // Used by ViewPager. "Object" represents th...
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What's the difference between @Component, @Repository & @Service annotations in Spring?

...th @Controller and it will NOT work with @Component, @Service, @Repository etc... Note: If a class is already registered as a bean through any alternate method, like through @Bean or through @Component, @Service etc... annotations, then @RequestMapping can be picked if the class is also annotated w...
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How are everyday machines programmed?

... (not so much computers and mobile devices as appliances, digital watches, etc) programmed? What kind of code goes into the programming of a Coca-Cola vending machine? How does my coffee maker accept a pre-programmed time and begin brewing a pot of coffee hours later, when that time arrives? ...
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What is the easiest/best/most correct way to iterate through the characters of a string in Java?

... In Java 8 we can solve it as: String str = "xyz"; str.chars().forEachOrdered(i -> System.out.print((char)i)); str.codePoints().forEachOrdered(i -> System.out.print((char)i)); The method chars() returns an IntStream as mentioned in doc: Returns a stream of int zero-extending the cha...
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Java Swing revalidate() vs repaint()

...ent to repaint itself. It is often the case that you need to call this in order to cleanup conditions such as yours. share | improve this answer | follow | ...
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What is __stdcall?

...rtain calling conventions. That determines where to put arguments, in what order, where the called function will find the return address, and so on. For example, __fastcall means that arguments of functions are passed over registers. The Wikipedia Article provides an overview of the different calli...
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Maven equivalent for python [closed]

...ation information, and you can build eggs, dist tarballs, binary tarballs, etc with it. share | improve this answer | follow | ...