Java公共/私有和静态修饰符如何影响在一行上声明的多个变量？

Question

以下是否相同？

private static boolean readAllFiles = false,readAllDirs = false; 

private static boolean readAllFiles = false; 
private static boolean readAllDirs = false; 

如果是这样，他们仍然有不同的修饰符值不同吗？

private static boolean readAllFiles = false,readAllDirs = true; 

Answer 1

是的，它们是等价的，不管它们的初始值如何。

下面是一些测试代码来演示：

public class TestClass 
{ 
    private static boolean readAllFiles = false,readAllDirs = true; 

    public static void main(String[] args) 
    { 
    //these two would result in COMPILE error if both vars were not static 
    System.out.println("readAllFiles: " + readAllFiles); 
    System.out.println("readAllDirs: " + readAllDirs); 
    } 
} 

---

public final class TestClass2 
{ 
    public static void main(String[] args) 
    { 
    //these two DO result in COMPILE error, because both vars are private 
    System.out.println("TestClass.readAllFiles: " + TestClass.readAllFiles); 
    System.out.println("TestClass.readAllDirs: " + TestClass.readAllDirs); 
    } 
} 

Answer 2

他们都是等价的。

你的最后一句话：

private static boolean readAllFiles = false,readAllDirs = true; 

等同于：

private static boolean readAllFiles = false; 
private static boolean readAllDirs = true;