十四章
1.方法定义
public 返回值类型 方法名(参数类型1 参数名1,参数类型2 参数名2···){
//方法体
}
2.有参数的调用
a.如果同一个类中,方法可以直接调用。
b.如果是不同的类,方法必须通过对象调用,
对象名,方法名(实参1,实参2···);
注意:1.实参的数据类型,参数的个数,参数的顺序要与形参保持一致
2.调用返回值的方法,一般要接收返回值,并作出相应的处理。
public class Excelle {
private String type;
private String id;
public Excelle(){
}
public Excelle(String type,String id ){
this.type = type;
this.id = id;
}
public String getType(){
return type;
}
public String getId(){
return id;
}
}
public class Excelle {
public static void main(String[] args){
Seller sl = new Seller();
Excelle car = new Excelle("abc","1");
sl.sell(car);
Regal rl = new Regal("bbb","2");
sl.sell(rl);
Excelle ec = new Excelle("ccc","3");
sl.sell(ex,5);
}
}
public class Student {
String name;
int age;
String sex;
String subject;
public Student(){
}
public Student(String name,int age,String sex,String subject){
this.name = name;
this.age = age;
this.sex = sex;
this.subject = subject;
}
public String getName(){
return name;
}
public int getAge(){
return age;
}
public String getSex(){
return sex;
}
public String getSubject(){
return subject;
}
public void wj(){
System.out.println("我是"+this.name+"年龄"+this.age+"性别"+this.sex+"专业"+this.subject);
}
}
public class Student{
public static void main(String[] args){
Student s = new Student("xy",18,"nan","aaa");
s.getAge();
s.getName();
s.getSex();
s.getSubject();
s.wj();
}
}