java 在java中将char数组的一部分转换为字符串
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Converting a part of a char array to string in java
提问by user2439222
I have a character array:
我有一个字符数组：
char[] a = {'I', ' ', 'm', 'i', 's', 's', ' ', 'y', 'o', 'u', '.'};
char[] a = {'I', ' ', 'm', 'i', 's', 's', ' ', 'y', 'o', 'u', '.'};
Now I want to convert a part of that character array(for example:'m', 'i', 's', 's') to a string. How can I do that?
现在我想将该字符数组的一部分（例如：'m'、'i'、's'、's'）转换为字符串。我怎样才能做到这一点？
回答by JB Nizet
You want to create a String. How about looking at the javadoc of String, find the constructors, and finding this one:
你想创建一个字符串。如何查看String 的 javadoc，找到构造函数，然后找到这个：
String(char[] value, int offset, int count)
Allocates a new String that contains characters from a subarray of the character array argument.
字符串（字符 [] 值，整数偏移量，整数计数）
分配一个新字符串，其中包含来自字符数组参数的子数组的字符。
回答by Ted Hopp
Try the String(char[], int, int)constructor:
尝试String(char[], int, int)构造函数：
String s = new String(a, 2, 4);
That will construct a Stringfrom the characters of array astarting at offset 2 and a length of 4.
这将从偏移量 2 和长度为 4String的数组字符构造一个a。
回答by DevZer0
If you want to convert the whole char array you should do
如果你想转换整个 char 数组，你应该这样做
String s = new String(a);
String s = new String(a);
回答by Dhananjay Joshi
First I want to know that you want which part of char array
首先我想知道你想要char数组的哪一部分
there are so many way to get part of that array
有很多方法可以获得该数组的一部分
First
String s = new String(a);
第一个
字符串 s = new String(a);
Second you can get part of array as mention below
其次，您可以获得数组的一部分，如下所述
public class Test2 {
公共类 Test2 {
public static void main(String[] args) {
char[] a = {'I', ' ', 'm', 'i', 's', 's', ' ', 'y', 'o', 'u', '.'};
String s = new String(a);
System.out.println("Whole Array :- "+s);
String[] array = s.split(" ");
System.out.println("\n Part Of Array");
for (String string : array) {
System.out.println(string);
}
}
}
}
