java类与实例

public class person {
private String name;
private int age;
public void  setname(String n){
name=n;
}
public String getname(){
return name;
}
public void  setage(int a){
age=a;
}
public int getage(){
return age;
}
public void show(){
System.out.println("name="+name+"\n age="+age);
}
}//建立一个person 类

public class demo1 {
public static void main(String []args){
person per=new person();
per.setname("xiaoqiang");
per.setage(20); 
per.show();
}

}//建立一个实例per、并调用方法