帮忙看看这个错是什么原因

[sghdls]

class Test{
public static void main(String args[]){
char a[]={'a','b','c','d'};
Test s = new Test();
s.makeDir(a);
}

protected void makeDir(char[] ca){
char a = Array.getChar(ca,5);
}
}

调试后：
Test.java:11: cannot find symbol
symbol : variable Array
location: class Test
char a = Array.getChar(ca,5);
↑
1 error

[sghdls]

问题解决了