[java]package javaapplication1;

/**
*
* @author hellogxp
*/
public class Father {
protected String name;

public static void main(String[] args) {
Father.eat();
Params params = new Params();
params.params(1, "para1", "para2");
Bingxing bingxing = new Bingxing();
int data = bingxing.fn(10);
System.out.println(data);
}

public static void eat() {
System.out.println("eat");
}
}

class Bingxing {

public int fn(int i) {
if (i == 0) {
return 0;
} else if (i == 1) {
return 1;
}else{
return 2*fn(i-1)+fn(i-2);
}
}
}[/java]
[java]package javaapplication1;

/**
*
* @author hellogxp
*/
public class Params {
public static void main(String arg[]) {

}

public void params(int a, String... books) {
for(int i =0; i < books.length; i++){
System.out.println(books[i]);
}
}

}[/java]