java 如何在字符数组中搜索特定字符？
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How to search a char array for a specific char?
提问by Samir Talwar
Lets say I have a char array that contains the sequences of chars: "robots laser car" I want to search for spaces in this char array in order to identify each separate word. I wanted to do something like this pseudocode below:
假设我有一个包含字符序列的字符数组：“机器人激光车”我想在这个字符数组中搜索空格以识别每个单独的单词。我想做类似下面这个伪代码的事情：
for lengthOfArray if array[i].equals(" ") doSomething();
对于 lengthOfArray 如果 array[i].equals(" ") doSomething();
But I cant find array methods to that comparison.
但是我找不到该比较的数组方法。
回答by Brian Colvin
Or the old fashioned way
或者老式的方式
for(int i = 0; i<array.length; i++){
if(' ' == array[i]){
doSomething();
}
}
回答by Samir Talwar
It's not exactly what you're asking for, but I'll throw it out there anyway: if you have a Stringinstead of a chararray, you can split by whitespace to get an array of strings containing the separate words.
这不完全是您所要求的，但无论如何我都会把它扔掉：如果您有一个String而不是char数组，您可以用空格分割以获得包含单独单词的字符串数组。
String s = new String(array);
String[] words = s.split("\s+");
// words = { "robots", "laser", "car" }
The \s+regular expression matches one or more whitespace characters (space, carriage return, etc.), so the string will be split on any whitespace.
该\s+正则表达式匹配的一个或多个空白字符（空格，回车，等），因此该字符串将是任何空白分裂。
回答by Michael Berry
Do you just want something like the following that loops through and does something when it gets to a space?
你只是想要像下面这样的东西，当它到达一个空间时循环并做一些事情吗？
for(char c : "robots laser car".toCharArray()) {
if(c==' ') {
//Do something
}
}
回答by Leo Izen
To iterate over the words inside a string, do this:
要遍历字符串中的单词，请执行以下操作：
for (String word : new String(charArray).split("\s+")){
doSomething(word); // Such as System.out.println(word);
}
