英文:
Why JVM is giving error "incompatible type: String cannot be converted to char" and how to fix it without using other method?
问题
public class Test2 {
public static void main(String arga[]) {
char arr[] = {'T','h','i','s',' ','i','s',' ','a',' ','t','e','s','t'};
String str = new String(arr);
System.out.println(str);
}
}
Output:
This is a test
错误出现在代码的这一行：
char arr[] = {"T","h","i","s"," ","i","s"," ","a"," ","t","e","s","t"};
这里试图用字符串字面量来初始化字符数组，然而字符数组应该使用单引号来表示字符，而不是双引号。正确的做法是使用单引号：
char arr[] = {'T','h','i','s',' ','i','s',' ','a',' ','t','e','s','t'};
这将会把字符数组初始化为包含指定字符的序列，之后就可以用这个字符数组创建一个字符串。
英文:
Code:
public class Test2 {
public static void main(String arga[]) {
char arr[] = {"T","h","i","s"," ","i","s"," ","a"," ","t","e","s","t"};
String str = new String(arr);
System.out.println(str);
}
}
Output:
Test2.java:5: error: incompatible types: String cannot be converted to char
char arr[] = {"T","h","i","s"," ","i","s"," ","a"," ","t","e","s","t"};
^
Where's the error in the above code and how to fix it? please dont recommend me to use other method like: String str = "This is a test"; etc etc. I want to know where's the error and how to fix this code, because I found this code on a book so I want to confirm if this is a printing mistake or something.
答案1
得分: 2
你正在尝试创建一个包含字符串的char数组。以下是正确的语法：
char arr[] = new char[]{'T','h','i','s',' ','i','s',' ','a',' ','t','e','s','t'};
String str = new String(arr);
System.out.println(str);
英文:
You are trying to create a char array with Strings. Here is the right syntax:
char arr[] = new char[]{'T','h','i','s',' ','i','s',' ','a',' ','t','e','s','t'};
String str = new String(arr);
System.out.println(str);
答案2
得分: 0
你正在使用字符串双引号 "。在处理字符时，您应该使用单引号 '。
英文:
You are using string double quotes ". You want to use a single quote ' when working with chars.
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