问题详情

在下列源代码文件Test.java中，正确定义类的代码是()。
A．pblic class test { public int x=0; public test(int x) { this. x=x;} }
B．public class Test { public int x=0; public Test(int x) { this. x=x;} }
C．public class Test extends T1,T2{ public int x = 0; public Test(int x){ this. x = x; } }
D．protected class Test extends T2{ public int x = 0; public Test(int x) { this. x = x; } }请帮忙给出正确答案和分析，谢谢！