Odtnhj

Normally, I will execute the followings:

System.out.println("Title DVD 1: " + dvd1.getTitle());
System.out.println("Title DVD 2: " + dvd2.getTitle());

Then I will get the titles of DVD 1 and DVD 2. If I want to print 100 titles of DVDs, obviously I need a lot of

System.out.println.

I managed to get these System.out.println in an ArrayList as follows:

ArrayList<String> displayDVDList = new ArrayList<String>();

for ( int i = 0; i <= 22; i++) 
 displayDVDList.add("System.out.println("Title DVD " + i + " : " 
 + dvd" + i + ".getTitle());");
 System.out.println(displayDVDList.get(i) + " ");

However, I cannot execute those System.out.println to display the titles. Thus, how to execute a value of ArrayList which happens to be System.out.println command?

Any help is much appreciated. Thank you.

Assuming the type of dvd1 and dvd2 is a class Dvd with the getTitle() method, your code could be something like the following, where the elements of the list are not String values, but Dvd objects.

// Build list of DVDs
Random random = new Random();
ArrayList<Dvd> displayDVDList = new ArrayList<>();
for (int i = 0; i <= 22; i++) 
 String dvdTitle = "DVD #" + (random.nextInt(1000) + 1);
 displayDVDList.add(new Dvd(dvdTitle));


// Print list of DVDs
for (int i = 0; i < displayDVDList.size(); i++) 
 Dvd dvd = displayDVDList.get(i);
 System.out.println("Title DVD " + (i + 1) + ": " + dvd.getTitle());

Every answer is helpful and I am adding to it .First Thing to
understand is , u want some property of your object to be printed. Use
toString() method from object class , as it it created specifically
for it . use arrayList.toString() and override toString() in your
class.

class Person1


 String name ;
 String state;
 public Person1(String name, String state) 
 super();
 this.name = name;
 this.state = state;
 
 public Person1() 
 super();
 
 @Override
 public String toString() 
 return "Person [name=" + name + ", state=" + state + "]";
 


public static void main(String args) 

 Person nitin = new Person("nitin", "delhi");
 Person chandan = new Person("chandan", "delhi");
 Person anshu = new Person("anshu", "bihar");
 Person rahul = new Person("rahul", "bihar");
 Person amar = new Person("nitin", "UP");

 List<Person> peoples = Arrays.asList(nitin,chandan, anshu, rahul,amar);

 System.out.println(peoples); 


 

You could load everything first and then print with the System.out.println. Java 8 has a way to run using stream. For example:

ArrayList<String> displayDVDList = new ArrayList<String>();
displayDVDList.add("Title 1");
displayDVDList.add("Title 2");
displayDVDList.add("Title 3");
displayDVDList.add("Title 4");
displayDVDList.add("Title 5");

displayDVDList.forEach(System.out::println);

I hope it helps you !