字符串示例
one thousand only
two hundred
twenty
seven
我如何改变一个大写字母的字符串的第一个字符,而不改变任何其他字母的情况?
更改之后应该是:
One thousand only
Two hundred
Twenty
Seven
注意:我不想使用apache.commons.lang.WordUtils来做这件事。
字符串示例
one thousand only
two hundred
twenty
seven
我如何改变一个大写字母的字符串的第一个字符,而不改变任何其他字母的情况?
更改之后应该是:
One thousand only
Two hundred
Twenty
Seven
注意:我不想使用apache.commons.lang.WordUtils来做这件事。
当前回答
String s=t.getText().trim();
int l=s.length();
char c=Character.toUpperCase(s.charAt(0));
s=c+s.substring(1);
for(int i=1; i<l; i++)
{
if(s.charAt(i)==' ')
{
c=Character.toUpperCase(s.charAt(i+1));
s=s.substring(0, i) + c + s.substring(i+2);
}
}
t.setText(s);
其他回答
String sentence = "ToDAY WeAthEr GREat";
public static String upperCaseWords(String sentence) {
String words[] = sentence.replaceAll("\\s+", " ").trim().split(" ");
String newSentence = "";
for (String word : words) {
for (int i = 0; i < word.length(); i++)
newSentence = newSentence + ((i == 0) ? word.substring(i, i + 1).toUpperCase():
(i != word.length() - 1) ? word.substring(i, i + 1).toLowerCase() : word.substring(i, i + 1).toLowerCase().toLowerCase() + " ");
}
return newSentence;
}
//Today Weather Great
在这里(希望这能让你明白):
/*************************************************************************
* Compilation: javac Capitalize.java
* Execution: java Capitalize < input.txt
*
* Read in a sequence of words from standard input and capitalize each
* one (make first letter uppercase; make rest lowercase).
*
* % java Capitalize
* now is the time for all good
* Now Is The Time For All Good
* to be or not to be that is the question
* To Be Or Not To Be That Is The Question
*
* Remark: replace sequence of whitespace with a single space.
*
*************************************************************************/
public class Capitalize {
public static String capitalize(String s) {
if (s.length() == 0) return s;
return s.substring(0, 1).toUpperCase() + s.substring(1).toLowerCase();
}
public static void main(String[] args) {
while (!StdIn.isEmpty()) {
String line = StdIn.readLine();
String[] words = line.split("\\s");
for (String s : words) {
StdOut.print(capitalize(s) + " ");
}
StdOut.println();
}
}
}
用这个:
char[] chars = {Character.toUpperCase(A.charAt(0)),
Character.toUpperCase(B.charAt(0))};
String a1 = chars[0] + A.substring(1);
String b1 = chars[1] + B.substring(1);
StringUtils.capitalize(str)
来自apache commons-lang。
2019年7月更新
目前,用于实现此功能的最新库函数包含在 org.apache.commons.lang3.StringUtils
import org.apache.commons.lang3.StringUtils;
StringUtils.capitalize(myString);
如果你正在使用Maven,在pom.xml中导入依赖项:
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>3.9</version>
</dependency>