java中throw与throws之间的区别

throw：
throw是语句抛出一个异常
语法：
throw (异常对象);
throw e;
throws：
throws是方法可能抛出异常的声明。(用在声明方法时，表示该方法可能要抛出异常)
语法：
(修饰符)(方法名)([参数列表])[throws(异常类)]{…}
public void doA(int a) throws Exception1,Exception3{…}
例子:
import java.util.Scanner;
public class test_6 {
public static void main(String[] args){
int age;
String name;
Scanner sc = new Scanner(System.in);
Scanner scanner = new Scanner(System.in);
age = sc.nextInt();
name = scanner.nextLine();
try{
people c1 = new people(name,age);
System.out.println(c1.get_name()+"======"+c1.get_age());
}catch (Exception fun){
System.out.println(fun.toString());
}

}

}
class people{
private String name;
private int age ;
public people(){}//空参构造
public people(String name,int age)throws Exception{//有参构造
this.name = name;
if(age<150&&age>0)
{
this.age=age;
}else
{
Exception e = new Exception(“年龄非法”);
throw e ;
}
}
public void set_name(String name){
this.name = name;
}
public String get_name(){
return name;
}
public void set_age(int age) throws Exception{
if(age<150&&age>0)
{
this.age=age;
}else
{
Exception e = new Exception(“年龄非法”);
throw e ;
}
}
public int get_age(){

    return age;
}

}