It really depends on how interested you are and how much time you spend learning. It also depends on if you have a programming background. There are many courses you can take online or at local colleges.
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You need to create a class and define a variable. If you are using Eclipse IDE, then right click and select 'generate setter and getter,' and it will be generated.
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It is presumed that you mean "main method." All Java programs have a main method as that is where the program execution begins. You'll just have to create the main method. public static void main (String [] args) { }.
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There is only one compiler for java and that comes along with Java JDK. What you see as various compilers are actually different IDEs for java programming, so as to ease the programmer according to their own needs.
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Java is basically a programming language. You have to first install Java from Oracle. Then you can use Notepad or Notepad++ as the IDE (on which to work with it). Just make sure that you save your Java file with an extension of .java.
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To run a Java program using Notepad and Command Prompt, write your Java code in Notepad and save it with a `.java` extension (e.g., `MyProgram.java`). Open CMD, navigate to the file location using `cd`, compile with `javac MyProgram.java`, and run it using `java MyProgram`. Ensure Java is installed and added to PATH.
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