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At runtime, find all classes in a Java application that extend a base class
...n, InstantiationException {
Reflections reflections = new Reflections("java.util");
Set<Class<? extends List>> classes = reflections.getSubTypesOf(java.util.List.class);
for (Class<? extends List> aClass : classes) {
System.out.println(aClass.getName());
...
Why don't Java's +=, -=, *=, /= compound assignment operators require casting?
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A likely reason to why the Java compiler adds a typecast is because if you're trying to perform arithmetic on incompatible types, there is no way of performing a typecast of the result using the contracted form. A typecast of the result is generally mo...
How do I pass a class as a parameter in Java?
Is there any way to pass class as a parameter in Java and fire some methods from that class?
10 Answers
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Java split string to array [duplicate]
...{
String testString = "Real|How|To|||";
System.out.println
(java.util.Arrays.toString(testString.split("\\|")));
// output : [Real, How, To]
}
}
The result does not include the empty strings between the "|" separator. To keep the empty strings :
public class StringSplit {
p...
Generating a Random Number between 1 and 10 Java [duplicate]
I want to generate a number between 1 and 10 in Java.
3 Answers
3
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【解决】Java报错：Implicit super constructor Object() is undefined for...
【解决】Java报错：Implicit super constructor Object() is undefined for default constructor. Must define an explicit constructor1、网上的常规解决步骤：把java的类库加载进去，在工程上右键选择属性 > Java Build Path的Libraries > Add Library选择JRE System Library > ...
What are the main uses of yield(), and how does it differ from join() and interrupt()?
I am a little bit confused about the use of yield() method in Java, specifically in the example code below. I've also read that yield() is 'used to prevent execution of a thread'.
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What's the nearest substitute for a function pointer in Java?
...pplication for passing in a function pointer to replace that one line, but Java doesn't have function pointers. What's my best alternative?
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“Code too large” compilation error in Java
Is there any maximum size for code in Java? I wrote a function with more than 10,000 lines. Actually, each line assigns a value to an array variable.
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Get generic type of class at runtime
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I am getting java.lang.Class cannot be cast to java.lang.reflect.ParameterizedType for this answer.
– Tomáš Zato - Reinstate Monica
May 1 '15 at 13:14
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