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
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);
}
其他回答
这里我们要实现单词的首字符大写
public static void main(String[] args) {
String input ="my name is ranjan";
String[] inputArr = input.split(" ");
for(String word : inputArr) {
System.out.println(word.substring(0, 1).toUpperCase()+word.substring(1,word.length()));
}
}
}
//输出:My Name Is Ranjan
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()));
}
}
我使用wordUppercase(String s)从雨滴库。 因为这是我的库，这里只有一个方法
/**
* Set set first letter from every word uppercase.
*
* @param s - The String wich you want to convert.
* @return The string where is the first letter of every word uppercase.
*/
public static String wordUppercase(String s){
String[] words = s.split(" ");
for (int i = 0; i < words.length; i++) words[i] = words[i].substring(0, 1).toUpperCase() + words[i].substring(1).toLowerCase();
return String.join(" ", words);
}
希望能有所帮助。
Simple answer by program:
public class StringCamelCase {
public static void main(String[] args) {
String[] articles = {"the ", "a ", "one ", "some ", "any "};
String[] result = new String[articles.length];
int i = 0;
for (String string : articles) {
result[i++] = toUpercaseForstChar(string);
}
for (String string : result) {
System.out.println(string);
}
}
public static String toUpercaseForstChar(String string){
return new String(new char[]{string.charAt(0)}).toUpperCase() + string.substring(1,string.length());
}
}
public static void main(String[] args) throws IOException {
String words = "this is a test";
System.out.println(Arrays.asList(words.split(" ")).stream().reduce("",(a, b)->(a + " " + b.substring(0, 1).toUpperCase() + b.substring(1))));
}
}
