java静态块+找不到符号

Question

Java14

public class Ex14 {
    static String strDef = "At the point of definition";

    static {String strBlock = "In a static block";}

    public static void main (String [] args){       
        System.out.println(Ex14.strDef);
        System.out.println(Ex14.strBlock);
    }

}

结果

$javac Ex14。爪哇

Ex14.java:10: error: cannot find symbol
        System.out.println(Ex14.strBlock);
                               ^
  symbol:   variable strBlock
  location: class Ex14
1 error

你能帮我理解为什么会发生这种错误吗

Answer 1

您的strBlock变量是静态初始值设定项块中的局部变量。它的范围仅限于该块，就像任何其他局部变量一样。如果希望能够在main方法中访问它，则需要将其声明为字段：

static strBlock; // Static field declaration

static {
    // Static field initialization
    strBlock = "Initialized in a static block";
}