5.4abc.java

JAVA程序设计的源代码

class A    //定义父类A
{
public int a1;
private float a2;
int getA()
{
return a1;
}
void setA(){}
}
class B extends A    //B继承了A
{
int b1;
String b2;
String getB()
{
return b2;
}
}
class C extends B    //C继承了B
{
int c;
public int a1;
int printc()
{
System.out.println(c);
}
}