Java中是否内置了一个函数，使字符串中每个单词的第一个字符大写，而不影响其他字符?
例子:
乔恩·斯基特->乔恩·斯基特 miles o'Brien -> miles o'Brien (B仍然是大写，这排除了Title Case) 老麦当劳->
*(老麦当劳也会被发现，但我不指望它有那么聪明。)
快速浏览一下Java字符串文档就会发现只有toUpperCase()和toLowerCase()，它们当然没有提供所需的行为。当然，谷歌的结果主要是这两个函数。它看起来像一个已经被发明出来的轮子，所以问一下也无妨，这样我以后就可以用它了。
当前回答
试试这个非常简单的方法
示例givenString="ram是好孩子"
public static String toTitleCase(String givenString) {
String[] arr = givenString.split(" ");
StringBuffer sb = new StringBuffer();
for (int i = 0; i < arr.length; i++) {
sb.append(Character.toUpperCase(arr[i].charAt(0)))
.append(arr[i].substring(1)).append(" ");
}
return sb.toString().trim();
}
输出将是:公羊是好孩子
其他回答
我做了这个小类，可以用来大写一个句子中的每个单词。如果不是空格，可以更改字符串中的单词分隔符。
package com.ecnews.ecnews_v01.Helpers;
public class Capitalize {
String sentence;
String separator = " ";
public Capitalize(String sentence) {
this.sentence = sentence;
}
public void setSeparator(String separator) {
this.separator = separator;
}
public String getCapitalized() {
StringBuilder capitalized = new StringBuilder("");
for (String word : sentence.split(separator)) {
capitalized.append(separator+Character.toUpperCase(word.charAt(0)) + word.substring(1));
}
return capitalized.toString().trim();
}
}
例子:
String sourceName = new Capitalize("this is a test"). get资本化();
sourceName将是“This Is A Test”
String toBeCapped = "i want this sentence capitalized";
String[] tokens = toBeCapped.split("\\s");
toBeCapped = "";
for(int i = 0; i < tokens.length; i++){
char capLetter = Character.toUpperCase(tokens[i].charAt(0));
toBeCapped += " " + capLetter + tokens[i].substring(1);
}
toBeCapped = toBeCapped.trim();
这是我做的另一种方法
StringBuilder str=new StringBuilder("pirai sudie test test");
str.setCharAt(0,Character.toUpperCase(str.charAt(0)));
for(int i=str.length()-1;i>=0;i--)
{
if(Character.isSpaceChar(str.charAt(i)))
str.setCharAt(i+1,Character.toUpperCase(str.charAt(i+1)));
}
System.out.println(str);
最基本和最简单的理解方法(我认为):
import java.util.Scanner;
public class ToUpperCase {
static Scanner kb = new Scanner(System.in);
public static String capitalize(String str){
/* Changes 1st letter of every word
in a string to upper case
*/
String[] ss = str.split(" ");
StringBuilder[] sb = new StringBuilder[ss.length];
StringBuilder capped = new StringBuilder("");
str = "";
// Capitalise letters
for (int i = 0; i < ss.length; i++){
sb[i] = new StringBuilder(ss[i]); // Construct and assign
str += Character.toUpperCase(ss[i].charAt(0)); // Only caps
//======================================================//
// Replace 1st letters with cap letters
sb[i].setCharAt(0, str.charAt(i));
capped.append(sb[i].toString() + " "); // Formatting
}
return capped.toString();
}
public static void main(String[] args){
System.out.println(capitalize(kb.nextLine()));
}
}
public void capitaliseFirstLetterOfEachWord()
{
String value="this will capitalise first character of each word of this string";
String[] wordSplit=value.split(" ");
StringBuilder sb=new StringBuilder();
for (int i=0;i<wordSplit.length;i++){
sb.append(wordSplit[i].substring(0,1).toUpperCase().
concat(wordSplit[i].substring(1)).concat(" "));
}
System.out.println(sb);
}
