最简单的方法来获取除字符串中的最后一个单词之外的每个单词

Question

What is the easiest way to get every word in a string other than the last word in a string? Up until now I have been using the following code to get the last word:

String listOfWords = "This is a sentence";
String[] b = listOfWords.split("\\s+");
String lastWord = b[b.length - 1];

And then getting the rest of the the string by using the remove method to remove the last word from the string.

I don't want to have to use the remove method, is there a way similar to the above set of code to get the a varying string of words without the last word and last space?

Answer 1

Like this:

    String test = "This is a test";
    String firstWords = test.substring(0, test.lastIndexOf(" "));
    String lastWord = test.substring(test.lastIndexOf(" ") + 1);

Answer 2

you could get the lastIndexOf the whitespace and use substring like below:

            String listOfWords = "This is a sentence";
        int index= listOfWords.lastIndexOf(" ");
        System.out.println(listOfWords.substring(0, index));
    System.out.println(listOfWords.substring(index+1));

Output:

        This is a
        sentence

Answer 3

Try using the method String.lastIndexOf in combination with String.substring .

String listOfWords = "This is a sentence";
String allButLast = listOfWords.substring(0, listOfWords.lastIndexOf(" "));

Answer 4

I added one line to your code, No remove here

String listOfWords = "This is a sentence";      
    String[] b = listOfWords.split("\\s+");
    String lastWord = b[b.length - 1];
    String rest = listOfWords.substring(0,listOfWords.indexOf(lastWord)).trim(); // Added
    System.out.println(rest);

Answer 5

This will suit your needs:

.split("\\s+[^\\s]+$|\\s+")

For example:

"This is a sentence".split("\\s+[^\\s]+$|\\s+");

Returns:

[This, is, a]

Answer 6

public class StringArray {

/**
 * @param args the command line arguments
 */
public static void main(String[] args) {

    String sentense="this is a sentence";

    int index=sentense.lastIndexOf(" ");

    System.out.println(sentense.substring(0,index));

}

}