一个莫名奇妙的异常_J2SE

一个莫名奇妙的错误
class Person{
private String name;
private int age;
public Person(String name,int age){
this.name=name;
this.age=age;
}
public boolean compare(Person per){
Person p1=this;
Person p2=per;
if(p1==p2){
return true;
}
if(p1.name.equals(p2.name)&&p1.age==p2.age){
return true;
}else{
return false;
}
}
public class Demo{
public static void main(String []args){
Person p1=new Person("sunxiaolong",35);
Person p2=new Person("nixiaohuan",26);
if(p1.compare(p2)){
System.out.println("想等");
}
else{
System.out.println("不相等");
}
}
}

}总是提示没有main函数，能解决此问题给最高分

------解决方案--------------------
总是提示没有main函数，能解决此问题给最高分
你如何写的命令？应该是
java Demo吧，你写的java Person?或者java Demo.class ?
------解决方案--------------------
+1

探讨
总是提示没有main函数，能解决此问题给最高分
你如何写的命令？应该是
java Demo吧，你写的java Person?或者java Demo.class ?

------解决方案--------------------
改完了。自己看吧

Java code

class Person{    private String name;    private int age;    public Person(String name,int age){        this.name=name;            this.age=age;    }    public boolean compare(Person per){          Person p1=this;          Person p2=per;          if(p1==p2){              return true;            }           if(p1.name.equals(p2.name)&&p1.age==p2.age){            return true;           }else{              return false;            }    }    }public class Demo{  public static void main(String []args){      Person p1=new Person("sunxiaolong",35);      Person p2=new Person("nixiaohuan",26);      if(p1.compare(p2)){          System.out.println("想等");      }else{          System.out.println("不相等");      }  }}
------解决方案--------------------
javac Demo.java
java Demo
结果是不相等
------解决方案--------------------
//基本语法错误，
Java codeclass Person {    private String name;    private int age;    public Person(String name, int age) {        this.name = name;        this.age = age;    }    public boolean compare(Person per) {        Person p1 = this;        Person p2 = per;        if (p1 == p2) {            return true;        }        if (p1.name.equals(p2.name) && p1.age == p2.age) {            return true;        } else {            return false;        }    }}public class Demo {    public static void main(String[] args) {        Person p1 = new Person("sunxiaolong", 35);        Person p2 = new Person("nixiaohuan", 26);        if (p1.compare(p2)) {            System.out.println("想等");        } else {            System.out.println("不相等");        }    }}
------解决方案--------------------
public static void main(String []args)
public static void main(String[] args)
自己看看。
------解决方案--------------------
public class Demo前面少了一个“}”。
------解决方案--------------------
Java codeclass Person{private String name;private int age;public Person(String name,int age){this.name=name;this.age=age;}  public boolean compare(Person per){  Person p1=this;  Person p2=per;  if(p1==p2){  return true;  }  if(p1.name.equals(p2.name)&&p1.age==p2.age){  return true;  }else{  return false;  }}}//括号加在这里 最后的去掉  public class Demo{  public static void main(String[] args){  Person p1=new Person("sunxiaolong",35);  Person p2=new Person("nixiaohuan",26);  if(p1.compare(p2)){  System.out.println("想等");  }  else{  System.out.println("不相等");  }  }  }