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package a;
public interface aaa {
public int getMax();
String getMes();
}
package a;
import static java.lang.System.out;
public class test implements aaa
{
public int getMax()
{
int i = 123;
return i;
}
public String getMes()
{
String s ="实现接口里的方法";
return s;
}
public static void main(String[] args) {
// TODO Auto-generated method stub
test t = new test();
int i = t.getMax();
String s = t.getMes();
out.println(i);
out.println(s);
}
}
抽象类的抽象方法必须被继承,抽象类里可以有普通方法,抽象类不能被实例化
instanceof
if( a instanceof B)
{ }
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原文地址:http://www.cnblogs.com/yanmantianxia/p/5460338.html