java extension, the -source option must be used to tell the java command to use the source-file mode. Supported values of N for this release are 6, 7, 8, 9, 10, and 11. You'll get an error message if you use a value of N that is no longer supported. The valid values of N change for each release, with new values added and old values removed. Optional: Arguments following mainclass, source-file, -jar jarfile, and -m or -module module/ mainclass are passed as arguments to the main class. See Using Source-File Mode to Launch Single-File Source-Code Programs Specifies the source file that contains the main class when using source-file mode. Only used to launch a single source-file program. In other words, mainclass can be used when it is not specified by the module, or to override the value when it is specified. If you’re using JAR files, then see jar.Įxecutes the main class in a module specified by mainclass if it is given, or, if it is not given, the value in the module. When you use -jar, the specified JAR file is the source of all user classes, and other class path settings are ignored. The jarfile argument is the name of a JAR file with a manifest that contains a line in the form Main-Class: classname that defines the class with the public static void main(String args) method that serves as your application's starting point. Command-line entries following classname are the arguments for the main method.Įxecutes a program encapsulated in a JAR file. Specifies the name of the class to be launched. See Overview of Java Options for a description of available options. Optional: Specifies command-line options separated by spaces. To launch a single source-file program: java source-file To launch the main class in a module: java -m module To launch the main class in a JAR file: java -jar jarfile The javaw launcher will, however, display a dialog box with error information if a launch fails. Use javaw when you don’t want a command prompt window to appear. But watching people build a website or write a program or navigate the BASH always captivates me.Windows: The javaw command is identical to java, except that with javaw there’s no associated console window. Instead of killing the bad guys on my PS4, you could watch me kill bad SQL or create REST Services. We built them for SQLcl, but they’re also available in SQL Developer and SQL Developer Web! Try INFO+ if you want the column stats vs comments. Use the DDL command, and use the INFO command. I have two ways to get this information, faster than you can get it by clicking around in the tree. It’s also the easiest way to explore the contents of your database.īut what if you don’t need to explore? What if you simply want the DDL for an object, or maybe a list of indexes or foreign keys? There’s nothing wrong with the Connection Tree. You don’t have to Test your connection first, you can just ‘Save’ it, if you’re confident 🙂 5. We don’t ‘nuke’ the existing connection, we’l instead create a new one with the new name, and the original one remains. Just edit an existing connection, give it a new name. You want to add a second connection to the same database. I’ve seen people do this so many times…you have a connection to one database. You can nest as many levels as you want, and you can do this on the DBA connection panel, too! 4. The easiest way to do is this is to add them to a folder, or even subfolder. The first is, give your connections GOOD names. I was using the mouse to execute the script, but F5 is faster. Now, sometimes you’ll want that running log. I use this all the time, and so does Franck!Īs you’re testing a snippet of code, you’re going to be making changes and running it, over and over again. Avoid the ‘Clear’ button, just use Clear Screen If you don’t use statement delimiters – the semicolon – you will need to highlight your code first. I was watching my co-worker, write her statement, then circle back, select the text, then use the ‘Execute’ button on the toolbar.Īnd if you’re using statement delimiters, or if you only have a single statement in your worksheet, it’s completely unecessary. What are the very, very basics of the UI/UX in SQL Developer? End of day, Franck just pushed me to ‘get busy blogging, or get busy dying.’ 1. I ALSO wanted to get down to the lowest possible level of this concept. This post will be over in just 2 more minutes 🙂 You can watch it now of course, but it’s about 17 minutes long. This feeling, or reaction was the driving force behind my “ SQL Developer, You’re Doing it Wrong” video. It bothers me to watch people do stuff less efficiently than they could be. watching a co-worker use SQL Developer over Zoom.This post was inspired by two simple events –

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