Creating an else condition in a loop if string does not exist in an array

Question

The output i need

enter name: john

name not found in array

Here is my pseudocode

//ask for name
System.out.print("enter name")
name = sc.nextLine()

//loop to check if name exists in my array
for (int count = 0; count < arrayofnames.length; count++)
{ 
    if (name.equals(arrayofnames[count]))
    { code to be executed if name is found in arrayofnames }
}

I tried putting an else/else if condition after the if but it executes the code arrayofnames.length times. How do I only make it print something like "name not found in array" only once then break?

the if block only checks if the name exists in an array it doesnt check if the name DOES NOT exist in the array — xdasryrytry
– xdasryrytry, Commented Jun 29, 2021 at 3:00
@AngeloMiguelLicsi The for loop checks if the name exists in the array. But you don't know until you check everywhere in the array. — Elliott Frisch
– Elliott Frisch, Commented Jun 29, 2021 at 3:01
Do the names need to be in an array? If you store them in a Set, you can check using the contains() method. — John Bayko
– John Bayko, Commented Jun 29, 2021 at 3:11

Scary Wombat · Accepted Answer · 2021-06-29 03:02:02Z

4

You can have a flag, which you can test after the loop

System.out.print("enter name")
name = sc.nextLine()

boolean found = false;

for (int count = 0; count < arrayofnames.length; count++)
{ 
    if (name.equals(arrayofnames[count]))
    { 
        found = true;
        break;
    }
}

if (!found) System.out.println ("Not found");

answered Jun 29, 2021 at 3:02

Scary Wombat

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1 Comment

xdasryrytry Over a year ago

i love you. this solved it. not really familiar with booleans lol

RoeiEilat · Accepted Answer · 2021-06-29 03:07:32Z

0

public static void main(String[] args) {
        String name = "jhn";
        String[] arrayofnames = {"john", "tomer", "roy", "natalie"};
        IsName(name, arrayofnames);

        
    }
    public static void IsName(String _name, String[] _arrayofnames){
        boolean a = false;
        for (String name : _arrayofnames) {
            if(name == _name){
                System.out.println("name is in the array");
                a = true;
            }
        }
        if(!a){
            System.out.println("name is not in the array");
        }
    }

answered Jun 29, 2021 at 3:07

RoeiEilat

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Comments

Sai H. · Accepted Answer · 2021-06-29 03:53:37Z

0

You can solve this problem by putting your String[] arrayOfNames into an ArrayList<> and simply checking if the ArrayList<> contains the name given by the user.

String[] arrayOfNames = {"Angelo", "David", "John"};
String name = "Angelo"; //the name given by the user

ArrayList<String> newArray = new ArrayList<>(Arrays.asList(arrayOfNames));
//check too see if the ArrayList contains the name
if (newArray.contains(name))
    System.out.println("Name found in array");
else
    System.out.println("Name not found in array");

answered Jun 29, 2021 at 3:53

Sai H.

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Comments

csalmhof · Accepted Answer · 2021-06-29 07:37:20Z

0

If you want your code more compact, you can also use Streams to check if any element of the array equals the given String like this:

boolean found = Arrays.stream(arrayofnames).anyMatch(n -> n.equals(name));

if(found) {
  //code to be executed if name is found in arrayofnames 
}

edited Jun 29, 2021 at 7:37

answered Jun 29, 2021 at 7:28

csalmhof

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