如何在Java中将String数组转换为char数组
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How to convert a String array to char array in Java
提问by AmanArora
We are given an array of Strings and what we require is a char[], i.e, array of all characters in all the Strings For example:
给定一个字符串数组，我们需要的是一个char[]，即所有字符串中所有字符的数组，例如：
Input: [i, love, you]
输入：[我，爱，你]
output: [i, l, o, v, e, y, o, u]
输出：[i, l, o, v, e, y, o, u]
First I made an array of arrays.
首先，我制作了一个数组数组。
Then I have found the length of the required char[] array.
然后我找到了所需的 char[] 数组的长度。
I have tried the following so far:
到目前为止，我已经尝试了以下方法：
char[][] a1 = new char[str.length][];
for(int i =0;i<str.length;i++){
a1[i]=str[i].toCharArray();
}
int total=0;
for(int i =0;i<str.length;i++){
total = total + a1[i].length;
}
char[] allchar = new char[total];
for(int i=0;i<str.length;i++){
//NOW HERE I WANT TO MERGE ALL THE char[] ARRAYS TOGETHER.
//HOW SHOULD I DO THIS?
}
回答by SudoRahul
You can do that like this
你可以这样做
char[] allchar = new char[total]; // Your code till here is proper
// Copying the contents of the 2d array to a new 1d array
int counter = 0; // Counter as the index of your allChar array
for (int i = 0; i < a1.length; i++) {
for (int j = 0; j < a1[i].length; j++) { // nested for loop - typical 2d array format
allchar[counter++] = a1[i][j]; // copying it to the new array
}
}
回答by Eduardo Dennis
You can do something like the following method..
您可以执行类似以下方法的操作..
public void converter(String[] stringArray) {
char[] charsInArray = new char[500]; //set size of char array
int counterChars = 0;
for (int i = 0; i < stringArray.length; i++) {
int counterLetters = 0; //declare counter for for amount of letters in each string in the array
for (int j = 0; j < stringArray[i].length(); j++) {
// below pretty self explanatory extracting individual strings and a
charsInArray[counterChars] = stringArray[i].charAt(counterLetters);
counterLetters++;
counterChars++;
}
}
}
回答by Faraz
String [] s = new String[]{"i", "love", "you"};
int length = 0;
for (int i = 0; i < s.length; i++) {
for (int j = 0; j < s[i].length(); j++) {
length++;
}
}
char [] c = new char[length];
int k = 0;
for (int i = 0; i < s.length; i++) {
for (int j = 0; j < s[i].length(); j++) {
c[k] = s[i].charAt(j);
k++;
}
}
for (int j = 0; j < c.length; j++) {
System.out.print("char is: " + c[j]);
}
回答by Dan Rothman
String[] sArray = {"i", "love", "you"};
String s = "";
for (String n:sArray)
s+= n;
char[] c = s.toCharArray();
回答by Gokul Krishna gK
public static void main(String[] args)
{
String sentence="Gokul Krishna is class leader";
String[] array=sentence.split("\s");
int counter;
//String word = new String();
for(String word:array)
{
counter=0;
char[] wordArray=word.toCharArray();
for(int i=0;i<wordArray.length;i++)
{
counter++;
}
System.out.println(word+ " :" +counter);
}
}
