Java StringJoiner - merge() Method
The java.util.StringJoiner.merge() method is used to add the contents of the given StringJoiner without prefix and suffix as the next element if it is non-empty. If the given StringJoiner is empty, the call has no effect.
A StringJoiner is empty if add() has never been called, and if merge() has never been called with a non-empty StringJoiner argument.
If the other StringJoiner is using a different delimiter, then elements from the other StringJoiner are concatenated with that delimiter and the result is appended to this StringJoiner as a single element.
Syntax
public StringJoiner merge(StringJoiner other)
Parameters
other |
Specify the StringJoiner whose contents should be merged into this one. |
Return Value
Returns this StringJoiner.
Exception
Throws NullPointerException, if the other StringJoiner is null.
Example:
In the example below, the java.util.StringJoiner.merge() method is used to find out the merge of the given StringJoiner.
import java.util.*;
public class MyClass {
public static void main(String[] args) {
//creating a StringJoiner object
StringJoiner joinNames1 = new StringJoiner(", ","[","]");
StringJoiner joinNames2 = new StringJoiner(", ","{","}");
//Adding values to joinNames1
joinNames1.add("John");
joinNames1.add("Marry");
//Adding values to joinNames1
joinNames2.add("Kim");
joinNames2.add("Jo");
//printing joinNames1 and joinNames2
System.out.println("joinNames1 contains: " + joinNames1);
System.out.println("joinNames2 contains: " + joinNames2);
//merging the joinNames2 into joinNames1
joinNames1.merge(joinNames2);
//printing joinNames1 after merge
System.out.print("\nAfter merge joinNames1 contains: ");
System.out.println(joinNames1);
}
}
The output of the above code will be:
joinNames1 contains: [John, Marry]
joinNames2 contains: {Kim, Jo}
After merge joinNames1 contains: [John, Marry, Kim, Jo]
❮ Java.util - StringJoiner
