Variables in Miranda

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 and initializes it
        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 with var (Java 10+)
        var d = true;
        System.out.println(d);

        // Variables declared without 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
        // But we can use var for type inference in local variables (Java 10+)
        var f = "apple";
        System.out.println(f);
    }
}

To run the program:

$ javac Variables.java
$ java Variables
initial
1 2
true
0
apple

In Java, variables are declared with their type (or var for local variable type inference in Java 10+) followed by the variable name. Unlike Go, Java doesn’t have a := operator for short variable declaration and initialization.

Variables in Java are also explicitly declared, but the syntax is slightly different. Here are some key points:

1. We use String, int, boolean, etc., to declare variables of specific types.
2. Multiple variables of the same type can be declared and initialized in one line.
3. Java 10+ introduced the var keyword for local variable type inference, similar to Go’s type inference.
4. Variables declared without initialization are given default values. For example, int defaults to 0, boolean to false, and object references to null.
5. Java doesn’t have a direct equivalent to Go’s := syntax. However, we can use var (in Java 10+) for concise local variable declarations with type inference.

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