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 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
其他回答
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();
}
}
}
如果你只想大写一个名为input的字符串的第一个字母,其余的保持不变:
String output = input.substring(0, 1).toUpperCase() + input.substring(1);
现在输出将有您想要的内容。在使用此方法之前,请检查您的输入至少是一个字符,否则将会出现异常。
把所有的东西加在一起,在字符串的开头修剪出额外的空白是一个好主意。否则,.substring(0, 1)。toUpperCase将尝试大写一个空白。
public String capitalizeFirstLetter(String original) {
if (original == null || original.length() == 0) {
return original;
}
return original.trim().substring(0, 1).toUpperCase() + original.substring(1);
}
public static String capitalize(String str){
String[] inputWords = str.split(" ");
String outputWords = "";
for (String word : inputWords){
if (!word.isEmpty()){
outputWords = outputWords + " "+StringUtils.capitalize(word);
}
}
return outputWords;
}
class Test {
public static void main(String[] args) {
String newString="";
String test="Hii lets cheCk for BEING String";
String[] splitString = test.split(" ");
for(int i=0; i<splitString.length; i++){
newString= newString+ splitString[i].substring(0,1).toUpperCase()
+ splitString[i].substring(1,splitString[i].length()).toLowerCase()+" ";
}
System.out.println("the new String is "+newString);
}
}