下列ABCD注释标注的哪行代码有错误？ class Tom { private int x = 120; protected int y = 20; int z = 11; private void f() { x = 200; System. out. printIn (x); } void g() { x = 200; System. out. println (x); } } public class E { public static void main (String args[]) Tom tom = new Tom(); tom. x = 22; //A tom. y = 33; //B tom. z = 55;//C tom. g () ; //D } }

该段代码有一个语法错误，应该在 main 方法的第五行末尾加上 `{`，正确代码如下：

class Tom {
    private int x = 120;
    protected int y = 20;
    int z = 11;
    
    private void f() {
        x = 200;
        System.out.println(x);
    }
    
    void g() {
        x = 200;
        System.out.println(x);
    }
}

public class E {
    public static void main(String args[]) {
        Tom tom = new Tom();
        tom.x = 22; //A 
        tom.y = 33; //B 
        tom.z = 55; //C 
        tom.g();    //D
    }
}

这样就可以通过编译了。