(day4)Write a pair of Poker--The transfer of parameter.

1.The transfer of a parameter
2.The variable parameter(可变参数)(The amount of parameter is uncertain)

public class Person(){
  public eat(int a){
  a++;
  }
}

publci class Myclass(){
Person p = new Person();
int a = 10;
eat(10);
System.out.println("a =" +a);
 // a = 10
}

We can find that in the class Myclass,if we System.out.println("a = "+a);
a is still 10;

1.The transfer of parameter in Java -- the transfer of a value(值传递)

Through the above description,we can find that the transfer of parameter in Java is just pass a copied value not the a itself(its address).

2.The variable parameter

We can define a variable parameter by this way:

public class Person(){
public void test4(String ... args){
  // String[] args = String ... args
  for(int i = 0; i < args.length; i++)
  System.out,println(args[i]);
  }
}

Then we can access this array by this way

public class Myclass(){
  Person p = new Person();
  p.test4("Merry","Jack","Bob")
// It will display :
//Merry
//Jack
//Bob
}