How do functions work in JAVA?

Question

Java

Hello dear, below I will give the JavaScript code, please explain how to do the same in JAVA.

JavaScript

var text = "Hello World";
function run(){
for(var i=0;i<10;i++) {
document.write(text);
}
}
run();

I made some JAVA sketches, but apparently I'm confusing something with the syntax

JAVA

class Rextester
{
public static void main(String[] args) {
String text = "JavaRush. Learn once — use anywhere";
run();
}
public static void run() {
for(int i = 0; i<10; i++ ){
System.out.println(text);
}
}
}

Or in JAVA, a function must always take some kind of argument?

Answer 1

And if you really want to have a "global" text variable:

class Rextester {
    public static String text;

    public static void main(String[] args) {
        text = "JavaRush. Learn once — use anywhere";
        run();
    }

    public static void run() {
        for (int i = 0; i < 10; i++) {
            System.out.println(text);
        }
    }
}

Answer 2

The text variable is in the scope of the main method, the run method does not see it. The run method will start seeing String text if you move the String text into the scope of the class - as a class field. And since this field is accessed from a static method, this variable must be static, or access it by creating an instance of the Rextester class