问如何在Java中调用类

EN

public class Hello {
private final String first;
private final String second;

public static void main(String[] args) {
    String s1 = "Hello";
    String s2 = "World";
    Hello h = new Hello(s1,s2);
    if(h.isHelloWorld()) {
        System.out.println("Hello to you too!");
    }
}
private Hello(String first, String second) {
    this.first = first;
    this.second = second;
}

private boolean isHelloWorld() {
    return (first.equals("Hello") && second.equals("World"));
    //If that scares you then do this instead: 
    /**
    if(first.equals("Hello") && second.equals("World") {
        return true;
    } else { return false; }
    **/
}
}