手动编译java的package问题，及演示继承的基本实现

不用IDE，而直接用命令编译JAVA包，仔细看了下，作一个记录。

以下的URL值得收藏。
http://www.aiuxian.com/article/p-2115485.html http://www.cnblogs.com/haolujun/archive/2013/03/02/2939698.html http://blog.sina.com.cn/s/blog_533074eb01014yd7.html
主要要理解classpath参数,d参数，及.作路径导向。

演示继承的四个文件如下：

Role.java

package cc.openhome;

public class Role {
private String name;
private int level;
private int blood;

public int getBlood() {
return blood;
}

public void setBlood(int blood) {
this.blood = blood;
}

public int getLevel() {
return level;
}

public void setLevel(int level) {
this.level = level;
}

public String getName() {
return name;
}

public void setName(String name) {
this.name = name;
}
}

SwordsMan.java

package cc.openhome;

public class SwordsMan extends Role {
public void fight() {
System.out.println("Attack with swords");
}
}

Magician.java

package cc.openhome;

public class Magician extends Role {
public void fight() {
System.out.println("Attack with magician");
}
}

RPG.java

package cc.openhome;

public class RPG {
public static void main(String[] args) {
SwordsMan swordsMan = new SwordsMan();
swordsMan.setName("Justin");
swordsMan.setLevel(1);
swordsMan.setBlood(200);
System.out.printf("SwordsMan: (%s, %d, %d)%n", swordsMan.getName(),
swordsMan.getLevel(), swordsMan.getBlood());

Magician magician = new Magician();
magician.setName("Monica");
magician.setLevel(2);
magician.setBlood(100);
System.out.printf("Magician: (%s, %d, %d)%n", magician.getName(),
magician.getLevel(), magician.getBlood());
}
}

目录结构平铺如下：



手动编译命令及执行顺序如下：

D:\learn>javac -cp . -d . Role.java

D:\learn>javac -cp . -d . SwordsMan.java

D:\learn>javac -cp . -d . Magician.java

D:\learn>javac -cp . -d . Role.java

D:\learn>javac -cp . -d . RPG.java

D:\learn>java -cp . cc.openhome.RPG
SwordsMan: (Justin, 1, 200)
Magician: (Monica, 2, 100)