
What is the Java ?: operator called and what does it do?
Not only in Java, this syntax is available within PHP, Objective-C too. In the following link it gives the following explanation, which is quiet good to understand it: A ternary operator is some …
What is the difference between == and equals () in Java?
0 In Java, == and the equals method are used for different purposes when comparing objects. Here's a brief explanation of the difference between them along with examples: == Operator: …
Java Versions and Compatibility - Stack Overflow
2023年4月10日 · Java 20 was fully ready for production use. (Java 20 no longer receives updates a few months after the successive version 21 ships.) You said: What is the JDK to Java SE …
java - How to view and edit cacerts file? - Stack Overflow
2015年11月24日 · As far as the original question, you can use the keytool command to view and edit a keystore like cacerts. To view all keys in the keystore, use keytool -list: $ keytool -list …
What does the arrow operator, '->', do in Java? - Stack Overflow
While hunting through some code I came across the arrow operator, what exactly does it do? I thought Java did not have an arrow operator. return (Collection<Car>) …
java - Setting active profile and config location from command …
2015年6月25日 · I was running it from eclipse and not command line till now. But I tried running from using "gradle bootRun -Dspring.config.location=C:\Config\ …
What are the -Xms and -Xmx parameters when starting JVM?
2013年2月7日 · The flag Xmx specifies the maximum memory allocation pool for a Java Virtual Machine (JVM), while Xms specifies the initial memory allocation pool. This means that your …
java - Extracting .jar file with command line - Stack Overflow
2011年12月10日 · Java has a class specifically for zip files and one even more specifically for Jar Files. java.util.jar.JarOutputStream java.util.jar.JarInputStream using those you could, on a …
Java system properties and environment variables
2011年8月14日 · What's the difference between system properties System.getProperties() and environment variables System.getenv() in a JVM?
java - && (AND) and || (OR) in IF statements - Stack Overflow
An interesting fact is that Java also uses the & and | as logic operands (they are overloaded, with int types they are the expected bitwise operations) to evaluate all the terms in the expression, …