错误
% javac StringTest.java
StringTest.java:4: variable errorSoon might not have been initialized
errorSoon[0] = "Error, why?";
Code
public class StringTest {
public static void main(String[] args) {
String[] errorSoon;
errorSoon[0] = "Error, why?";
}
}
当前回答
String[] arr = {"foo", "bar"};
如果你将一个字符串数组传递给一个方法，执行以下操作:
myFunc(arr);
或做的事:
myFunc(new String[] {"foo", "bar"});
其他回答
String[] errorSoon = { "foo", "bar" };
——或——
String[] errorSoon = new String[2];
errorSoon[0] = "foo";
errorSoon[1] = "bar";
您需要初始化errorSoon，正如错误消息所示，您只声明了它。
String[] errorSoon; // <--declared statement
String[] errorSoon = new String[100]; // <--initialized statement
在开始设置索引之前，需要初始化数组，以便为String元素分配正确的内存存储空间。
如果你只声明数组(就像你做的那样)，没有分配给String元素的内存，只有一个引用句柄给errorSoon，并且当你试图在任何索引处初始化一个变量时将抛出一个错误。
顺便说一句，你也可以在括号内初始化String数组{}，
String[] errorSoon = {"Hello", "World"};
这相当于
String[] errorSoon = new String[2];
errorSoon[0] = "Hello";
errorSoon[1] = "World";
String[] args = new String[]{"firstarg", "secondarg", "thirdarg"};
你可以这样写
String[] errorSoon = {"Hello","World"};
For (int x=0;x<errorSoon.length;x++) // in this way u create a for loop that would like display the elements which are inside the array errorSoon.oh errorSoon.length is the same as errorSoon<2
{
System.out.println(" "+errorSoon[x]); // this will output those two words, at the top hello and world at the bottom of hello.
}
String[] string=new String[60];
System.out.println(string.length);
对于初学者来说，这是初始化和获取STRING LENGTH代码的非常简单的方式
