printing data of specific element from array in java [duplicate]

Question

I have an array of a class type which stores videos (not real ones just objects). Each video has a title and an author. The videos have their data set using set methods like these:

 public class Clip {

 private String title;
 private String author;

     public void setTitle (String s1) {

        title = s1;

    }

     public void setAuthor (String s2) {

        title = s2;

    }

I then have a different class which creates the array and uses these set methods to enter data. The program then asks the user to select an element from the array, for example the user selects element [3]. Now the program must print the title and author of that element(video).

This is the part I am not sure how to do? Can I please have some help?

You are creating new strings in setters. Please don't do that. That should be this.title = s1; — Suresh Atta
– Suresh Atta, Commented Oct 18, 2013 at 10:43
This is exactly the same question as stackoverflow.com/questions/19446929/… just with a different example — Richard Tingle
– Richard Tingle, Commented Oct 18, 2013 at 10:47
@Suresh atta - How is he creating new strings? What dou you mean by that. He's passing a string reference and then assign it to the private field. There is no String constructor included, so basically it's all about references. — Matej
– Matej, Commented Oct 18, 2013 at 10:55

Winzu · Accepted Answer · 2013-10-18 10:47:10Z

2

Override toString() then simply call

System.out.println(element[3])

If you need help creating the toString method eclipse can show you how it's done.

Press Alt+Shift+S then S , or right click -> Source -> generate toString()

answered Oct 18, 2013 at 10:47

Winzu

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1 Comment

Richard Tingle Over a year ago

Yeah, thats what I thought too, seemingly that doesn't answer the OP's question

Ernestas Kardzys · Accepted Answer · 2013-10-18 10:50:16Z

Your implementation of Clip class is wrong. It should be something like this:

public class Clip {
        private String title;
        private String author;

        public Clip(String title, String author) {
            this.title = title;
            this.author = author;
        }

        public String getTitle() {
            return title;
        }

        public void setTitle(String title) {
            this.title = title;
        }

        public String getAuthor() {
            return author;
        }

        public void setAuthor(String author) {
            this.author = author;
        }
    }

And you can retrieve your objects from array like this:

@Test
    public void testClipArray() throws Exception {
        // Lets assume our array contains 2 elements
        Clip[] clipArray = new Clip[2];
        clipArray[0] = new Clip("First", "Clip");
        clipArray[1] = new Clip("Second", "Clip");

        // Lets retrieve 2nd object (with index: 1)
        Clip secondObject = clipArray[1];

        System.out.println(secondObject.getAuthor());
        System.out.println(secondObject.getTitle());
    }

blalasaadri · Accepted Answer · 2013-10-18 10:48:48Z

0

Basically you have two options:

Create getters in the Video-Class, e.g.public String getTitle() { return title; }
Override the toString function to output the value you want, e.g.

@Override public String toString() { return "Author: " + author + ", Title: " + title"; }

answered Oct 18, 2013 at 10:48

blalasaadri

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Comments

Enerccio · Accepted Answer · 2013-10-18 10:49:20Z

0

public class Clip {

private String title;
private String author;

 public void setTitle (String s1) {

    title = s1;

}

 public void setAuthor (String s2) {

    author = s2;

}

@Override
public String toString(){
    return author + ": " + title;
}

answered Oct 18, 2013 at 10:49

Enerccio

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Comments

Matej · Accepted Answer · 2013-10-18 10:49:30Z

0

Override toString method of Clip. Every invocation of print* (e.g. println) method would call toString method of an object.

    @Override
    public String toString() {
        return "[Title: " + this.title +", Author: " + this.author + "]";
    }

Example after overriding method:

    Clip clip1 = new Clip();
    Clip clip2 = new Clip();
    Clip[] clipArray = {clip1, clip2};

    for (Clip clip : clipArray) {
        System.out.println(clip);
    }

answered Oct 18, 2013 at 10:49

Matej

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Comments

Debabrata · Accepted Answer · 2013-10-18 10:49:38Z

0

Please override toString () of Clip class as below

@Override
public String toString() {
     return "Title:"+ this.s1 + "  Author:" + this.s2;
}


Then print the Title and Author by using the below code.
System.out.println(objectClip.toString());

answered Oct 18, 2013 at 10:49

Debabrata

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Comments

ovunccetin · Accepted Answer · 2013-10-18 10:51:31Z

0

Override toString() method of Clip class. For example,

public class Clip {

    private String title;
    private String author;

    public void setTitle (String s1) {
        title = s1;
    }

    public void setAuthor (String s2) {
        title = s2;
    }

    @Override
    public String toString() {
        return title + " by " + author;
    }
}

Then print the array of clips as follows:

for (Clip aClip : arrayOfClips) {
    System.out.println(aClip);
}

answered Oct 18, 2013 at 10:51

ovunccetin

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Comments

Dark Knight · Accepted Answer · 2013-11-11 08:06:01Z

0

Override toString() method in Clip class as follows,

 @override
   public String toString(){ 

    return "Title: "+ title +"  ,author"+author;

   }

and invocation code invoke following statement,

System.out.println(element[3]);

edited Nov 11, 2013 at 8:06

answered Oct 18, 2013 at 10:51

Dark Knight

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