Java 对象，实例化，方法的调用

1.编写一个类并创建实例
public class Student{ //创建类 private int age; //创建字段 private String name; public int getAge(){ return age;//获取年龄 } public void setAge(String age){ this.age = age;//设置年龄 } public String getName(){ return name; } public void setName(String name){ this.name = name; } }
2.创建实例
public static void main(String[] args){ Student student = new student(); }
3.调用
public static void main(String[] args){ Student student = new student(); student.setAge(12); //调用 student.setName("xiaoming"); System.out.println（"student age = "+student.getAge()); System.out.println("student name="+student.getStudent()); }