How to get last word from string in java?

In Java, you can find the last word in a `String` using various approaches. Here are some common methods: Method 1: Using `split()`

public class LastWordExample {
public static void main(String[] args) {
String str = "Hello world from Java";
String[] words = str.trim().split("\\s+");
String lastWord = words[words.length - 1];
System.out.println("Last word: " + lastWord);
}
}

Output:

Last word: Java

Explanation: - `trim()` removes leading and trailing spaces. - `split("\\s+")` splits the string by spaces (handling multiple spaces). - The last element of the array is accessed using `words.length - 1`. Method 2: Using `lastIndexOf()` and `substring()`

public class LastWordExample {
public static void main(String[] args) {
String str = "Hello world from Java";
str = str.trim(); // Remove leading/trailing spaces
int lastSpaceIndex = str.lastIndexOf(' ');
String lastWord = (lastSpaceIndex == -1) ? str : str.substring(lastSpaceIndex + 1);
System.out.println("Last word: " + lastWord);
}
}

Output:

Last word: Java

Explanation: - `lastIndexOf(' ')` finds the last space in the string. - `substring(lastSpaceIndex + 1)` extracts everything after the last space. - If no space is found (`lastIndexOf` returns `-1`), the entire string is returned. Method 3: Using `StringTokenizer`

import java.util.StringTokenizer;
public class LastWordExample {
public static void main(String[] args) {
String str = "Hello world from Java";
StringTokenizer tokenizer = new StringTokenizer(str);
String lastWord = "";
while (tokenizer.hasMoreTokens()) {
lastWord = tokenizer.nextToken();
}
System.out.println("Last word: " + lastWord);
}
}

Output:

Last word: Java

Explanation: - `StringTokenizer` breaks the string into words. - The last extracted word is stored in `lastWord`. Method 4: Using Streams (Java 8+)

import java.util.Arrays;
public class LastWordExample {
public static void main(String[] args) {
String str = "Hello world from Java";
String lastWord = Arrays.stream(str.trim().split("\\s+"))
.reduce((first, second) -> second)
.orElse("");
System.out.println("Last word: " + lastWord);
}
}

Output:

Last word: Java

Explanation: `split("\\s+")` creates a stream of words. `reduce((first, second) -> second)` keeps only the last word.