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How do I find the caller of a method using stacktrace or reflection?
...kTraceElements = Thread.currentThread().getStackTrace()
According to the Javadocs:
The last element of the array represents the bottom of the stack, which is the least recent method invocation in the sequence.
A StackTraceElement has getClassName(), getFileName(), getLineNumber() and getMet...
How to immediately see compile errors in project tree of IntelliJ Idea?
...r me the 'Problems' scope showed nothing even though there were a bunch of Java compiler error messages in the 'Messages' tab
– Tarmo
Nov 10 '17 at 8:16
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Compare if BigDecimal is greater than zero
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While I agree that this is the idiomatic solution in Java, I don't think it's actually readable. Every time I encounter an expression like this, I find myself writing a test to reassure myself that I've got it the right way around. Perhaps the fact that recently added classes, ...
Array Length in Java
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Can you show the javadoc? I don't know where this "length" property is.
– Philip Rego
Feb 13 '18 at 18:44
1
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A simple scenario using wait() and notify() in java
...ad will call wait() again.
As some of the other answers have mentioned, Java 1.5 introduced a new concurrency library (in the java.util.concurrent package) which was designed to provide a higher level abstraction over the wait/notify mechanism. Using these new features, you could rewrite the orig...
Convert String array to ArrayList [duplicate]
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Use this code for that,
import java.util.Arrays;
import java.util.List;
import java.util.ArrayList;
public class StringArrayTest {
public static void main(String[] args) {
String[] words = {"ace", "boom", "crew", "dog", "eon"};
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Rethrowing exceptions in Java without losing the stack trace
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In Java 7 compiler for such rethrow is more inteligent. Now it works fine with specific "throws" exceptions in containing method.
– Waldemar Wosiński
Jan 29 '13 at 16:18
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Java array reflection: isArray vs. instanceof
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Right, in Java, primitive data types are not objects, and don't extend java.lang.Object, so that makes sense. But instanceof can still be used to test for primitive arrays.
– erickson
Feb 13 '13 a...
ProcessBuilder: Forwarding stdout and stderr of started processes without blocking the main thread
I'm building a process in Java using ProcessBuilder as follows:
10 Answers
10
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What is the memory consumption of an object in Java?
... the actual object layout, footprint, and references, you can use the JOL (Java Object Layout) tool.
Object headers and Object references
In a modern 64-bit JDK, an object has a 12-byte header, padded to a multiple of 8 bytes, so the minimum object size is 16 bytes. For 32-bit JVMs, the overhead ...