Java has 5 different boolean compare operators: &, &&, |, ||, ^ & and && are "and" operators, | and || "or" operators, ^ is "xor" The single ones will check every parameter, regardless of the values, before checking the values of the parameters. The double ones will first check the left parameter and its value and if true (||) or false (&&) leave the second one untouched. Sound …

Mar 7, 2010 · I was just reading this line: The first thing the format() method does is load a Velocity template from the classpath named output.vm Please explain what was meant by classpath in this context, a...

Feb 7, 2013 · 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 JVM will be started with Xms amount of memory and will be able to use a maximum of Xmx amount of memory. For example, starting a JVM like below will start it with 256 MB of memory and will …

Aug 16, 2021 · How does my Java program know where my keystore containing the certificate is? Or alternatively: How do I tell my Java program where to look for the keystore? After specifying the keystore in some ...

Sep 26, 2008 · I know there's some JAVA_OPTS to set to remotely debug a Java program. What are they and what do they mean ?

JavaBeans are Java classes which adhere to an extremely simple coding convention. All you have to do is to implement the java.io.Serializable interface - to save the state of an object use a public empty argument constructor - to instantiate the object provide public getter/setter methods - to get and set the values of private variables ...

Sep 23, 2008 · Many times, a Java app needs to connect to the Internet. The most common example happens when it is reading an XML file and needs to download its schema. I am behind a proxy server. How can I set ...

Aug 5, 2015 · In Java Persistence API you use them to map a Java class with database tables. For example @Table () Used to map the particular Java class to the date base table. @Entity Represents that the class is an entity class. Similarly you can use many annotations to map individual columns, generate ids, generate version, relationships etc.

Feb 25, 2009 · This is an old thread, but I ran into java.net.SocketException: Connection reset yesterday. The server-side application had its throttling settings changed to allow only 1 connection at a time!

Jun 10, 2009 · Steps: Start your remote java application with debugging options as said in above post. Configure Eclipse for remote debugging by specifying host and port. Start remote debugging in Eclipse and wait for connection to succeed. Setup breakpoint and debug. If you want to debug from start of application use suspend=y , this will keep remote application suspended until you …