Programs are constructed command-by-command, where each command is placed on a new line. You can, for example, try to change above Ada Lovelace exercise print command to Systemoutprintln("hi!") - what you'll notice is that the line will be underlined and you'll be notified of an error on the left-hand side. However, the programming environment compiles the program continuously, so it can report errors.
The IDE both compiles and executes the program with just one press of a button.
This also affects the hints provided by the IDE, and in this way, the programmer can receive immediate feedback on any errors. When a program is compiled before execution, the compiler can search for errors in it. If you can see the program in a browser window, then you can easily copy the program to Notepad (or other. This compile process affects how and when errors occur. You dont have to type in the programs to run them. Following that, the program gets executed, meaning the commands are executed one-by-one by a Java-interpreter that is able to read Java bytecode. This compilation process is done by Java's compiler, which itself is a program.
#HOW TO EXECUTE BLUEJ PROGRAM CODE#
Change the code in your BlueJ class to look like Step 2) Create a new instance of HelloWorld.
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