标签：基本 line turn boolean class rgs close int style
使用java写一个简单的面向对象类的例子
编写一个电脑类，u盘类，光驱类，显示器类，电源类，电源一旦关闭，则内存无法访问
CDROM类
//光驱类 public class CDROM { public void cdromopen() { System.out.println("光驱打开"); } public void cdromclose() { System.out.print("光驱关闭"); } }
Power类
package test25;
//电源
public class Power
{
private boolean on;
private int div;//电流
public boolean on()
{
return on;
}
public void on(boolean on)
{
this.on=on;
}
public int getdiv()
{
return div;
}
public void setdiv(int div)
{
this.div=div;
}
}
computer类
//电脑
public class computer
{
private Power power;
private CDROM cdrom;
public Power getPower()
{
return power;
}
public void setPower(Power power)
{
this.power = power;
}
public CDROM getCdrom()
{
return cdrom;
}
public void setCdrom(CDROM cdrom)
{
this.cdrom = cdrom;
}
public void poweron()
{
getPower().on(true);
}
public void poweroff()
{
getPower().on(false);
}
public void oopencdrom()
{
if(getPower().on())
{
getCdrom().cdromopen();
}
else
{
System.out.println("没开电源");
}
}
public void closeecdrom()
{
if(getPower().on())
{
getCdrom().cdromclose();
}
else
{
System.out.println("没开电源");
}
}
public static void main(String[] args)
{
computer c1=new computer();
CDROM cr1=new CDROM();
Power power=new Power();
power.setdiv(5);
power.on(true);
c1.setCdrom(cr1);
c1.setPower(power);
c1.poweron();
c1.oopencdrom();
c1.closeecdrom();
c1.poweroff();
c1.oopencdrom();
}
}
最终打印结果为
光驱打开
光驱关闭
没开电源
通过上述列子了解了面向对象的基本内容，未来还很长 继续努力吧
标签：基本 line turn boolean class rgs close int style
原文地址：http://www.cnblogs.com/a986771570/p/7083308.html
