How to Concatenate Strings in List in Java - Step by Step Examples

How to Concatenate Strings in List in Java ?

Answer

To concatenate strings in a list in Java, you can use a loop to iterate over the list and append each string to a StringBuilder.

✐ Examples

1 Concatenate Strings in List Using StringBuilder

In this example,

We create a list named words with some strings.
We create a StringBuilder named result to store the concatenated string.
We iterate over the list using a for-each loop and append each string to the result with a specified separator.
Finally, we print the concatenated string to standard output.

Java Program

import java.util.List;
import java.util.ArrayList;

public class Main {
    public static void main(String[] args) {
        List<String> words = new ArrayList<>();
        words.add("Hello");
        words.add("World");
        words.add("!");

        StringBuilder result = new StringBuilder();
        for (String word : words) {
            result.append(word).append(" ");
        }

        System.out.println("Concatenated string: " + result.toString().trim());
    }
}

Output

Concatenated string: Hello World !

2 Concatenate Strings in Another List Using StringBuilder

In this example,

We create another list named phrases with different strings.
We use a similar approach to concatenate the strings in this list with a specified separator.
Finally, we print the concatenated string to standard output.

Java Program

import java.util.List;
import java.util.ArrayList;

public class Main {
    public static void main(String[] args) {
        List<String> phrases = new ArrayList<>();
        phrases.add("Good");
        phrases.add("morning");
        phrases.add("everyone");

        StringBuilder result = new StringBuilder();
        for (String phrase : phrases) {
            result.append(phrase).append(", ");
        }

        System.out.println("Concatenated string: " + result.toString().trim());
    }
}

Output

Concatenated string: Good, morning, everyone,

Summary

In this tutorial, we learned How to Concatenate Strings in List in Java language with well detailed examples.

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How to Concatenate Strings in List in Java - Step by Step Examples

How to Concatenate Strings in List in Java ?

Answer

✐ Examples

1 Concatenate Strings in List Using StringBuilder

Java Program

Output

2 Concatenate Strings in Another List Using StringBuilder

Java Program

Output

Summary

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