Exception类中有一个特殊的子类异常RuntimeException 运行时异常
如果在函数内容抛出该异常 函数上不用声明，编译一样通过
如果在该函数上声明了该异常，调用者可以不用运行处理，编译一样通过
如果声明是 Exception 必须进行捕抓 编译时异常
class Demo
{
public static void main(String[] args)
{
Exceptionc f=new Exceptionc();
f.Cold(-2);
}
}
class people{
private String name ;
private int Age;
public people(){
this.name=name;
this.Age=Age;
}
public void Study (){
System.out.println("正常学习功能");
}
public void ge(String name,int Age){
System.out.println("姓名："+name+"年龄"+Age);
}
}
class abnormal extends RuntimeException //Exception
{
public abnormal(String mag){
super(mag);
}
class Exceptionc
{
public void Cold (int a) throws abnormal
{
if(a==1)
{
people f = new people();
f.ge("李四",18);
f.Study();
}
else if(a==0)
throw new abnormal(" 轻度生病");
else if(a<1)
throw new abnormal("无药可救！");
}
}
}