Variables in Minitab

In Java, variables are explicitly declared and used by the compiler to check type-correctness of method calls.

public class Variables {
    public static void main(String[] args) {
        // String declares a variable
        String a = "initial";
        System.out.println(a);

        // You can declare multiple variables at once
        int b = 1, c = 2;
        System.out.println(b + " " + c);

        // Java will infer the type of initialized variables in some cases
        var d = true;
        System.out.println(d);

        // Variables declared without a corresponding
        // initialization are given default values. For example,
        // the default value for an int is 0.
        int e;
        System.out.println(e);

        // In Java, we don't have a direct equivalent to Go's := syntax.
        // Instead, we use the var keyword (introduced in Java 10)
        // for local variable type inference.
        var f = "apple";
        System.out.println(f);
    }
}

When you run this program, you’ll see:

initial
1 2
true
0
apple

In Java:

  1. We use String, int, boolean, etc., to declare variables with specific types.
  2. The var keyword (introduced in Java 10) can be used for local variable type inference, which is similar to Go’s type inference.
  3. Java doesn’t have a direct equivalent to Go’s := syntax. We either declare the type explicitly or use var for type inference.
  4. Variables in Java are also zero-valued when declared without initialization, similar to Go.
  5. Java uses System.out.println() for console output, which is analogous to Go’s fmt.Println().

Remember that in Java, all code must be inside a class, and the entry point of the program is the main method in a public class.