Reputation: 19
I have
String explanation = "The image-search feature will start rolling out in the next few days, said Johanna Wright, a Google search director. "Every picture has a story, and we want to help you discover that story she said.";
there are total number of words are 300
In Java, how do I get the first 50 words from the string?
Upvotes: 2
Views: 2768
Reputation: 420921
Depending on your definition of a word, this may do for you:
Search for the 50:th space character, and then extract the substring from 0 to that index.
Here is some example code for you:
public static int nthOccurrence(String str, char c, int n) {
int pos = str.indexOf(c, 0);
while (n-- > 0 && pos != -1)
pos = str.indexOf(c, pos+1);
return pos;
}
public static void main(String[] args) {
String text = "Lorem ipsum dolor sit amet.";
int numWords = 4;
int i = nthOccurrence(text, ' ', numWords - 1);
String intro = i == -1 ? text : text.substring(0, i);
System.out.println(intro); // prints "Lorem ipsum dolor sit"
}
Related question:
Upvotes: 1
Reputation: 52185
You can try something like this (If you want the first 50 words):
String explanation="The image-search feature will start rolling out in the next few days, said Johanna Wright, a Google search director. "Every picture has a story, and we want to help you discover that story she said."
String[] words = explanation.split(" ");
StringBuilder sb = new StringBuilder();
for (int i = 0; i < Math.min(50, words.length); i++)
{
sb.append(words[i] + " ");
}
System.out.println("The first 50 words are: " + sb.toString());
Or something like this if you want the first 50 characters:
String explanation="The image-search feature will start rolling out in the next few days, said Johanna Wright, a Google search director. "Every picture has a story, and we want to help you discover that story she said."
String truncated = explanation.subString(0, Math.min(49, explanation.length()));
Upvotes: 0
Reputation: 1415
Split the incoming data with a regex, bounds check, then rebuild the first 50 words.
String[] words = data.split(" ");
String firstFifty = "";
int max = words.length;
if (max > 50)
max = 50;
for (int i = 0; i < max; ++i)
firstFifty += words[i] + " ";
Upvotes: 0
Reputation: 7465
Here you go, perfect explanation: http://www.aliaspooryorik.com/blog/index.cfm/e/posts.details/post/show-the-first-n-and-last-n-words-232
Upvotes: 1