看一道简单的JAVA试题,答案是什么?
在如下源代码文件Test.java中,哪个是正确的类定义？
A. public 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. public class Test extends T1
{
public int x=0;
public Test(int x)
{
this.x = x;
}
}
E. protected class Test extends T2
{
public int x=0;
public Test(int x)
{
this.x=x;
}
}
答案好象是B和D,但是A和B应该是一样的啊?
[解决办法]
B D
A 类名test和文件名Test不一致
C 类不能继承两个父类
E 类的修饰不对..只能用pulic abstract final
