父類

package?com.zuche;

public??class?CarProperty?{
	/*public?String?carP1;//車輛名稱
	public??String?carP2;?//車輛類型
	?public?int?carP3;//載客量
?????public??int?carP4;//載貨量
?????public?int?carP5;?//租金每天
??????*/
	public?void?show(String?carP1,String?carP2,int?carP3,int?carP4,int?carP5)?{
		?System.out.println("?????"+carP1+"????????????????"+carP2+"???????????"+carP3+"?"
		?		+?"????"+carP4+"????"+carP5);
	}

}

子類

package?com.zuche;

public?class?HuoChe?extends?CarProperty{
??????????
}

package?com.zuche;

public?class?KeChe?extends?CarProperty?{

}

package?com.zuche;

public?class?PiKa?extends?CarProperty?{

}

測試

package?com.zuche;
import?java.util.*;
public?class?Initial?{

	public?static?void?main(String[]?args)?{
		//?TODO?Auto-generated?method?stub
		CarProperty?huo1=new?HuoChe();
		CarProperty?huo2=new?HuoChe();
		??CarProperty?ke1=new?KeChe();
		??CarProperty?ke2=new?KeChe();
		?????CarProperty?pi1=new?PiKa();
		?????CarProperty?pi2=new?PiKa();
		????
		?????int??sum=0;
		int?i3=0;
????System.out.println("請您選擇是否租車？");
????System.out.println("1,是????2,否");
????Scanner?input1=new?Scanner(System.in);
??????int?i1=input1.nextInt();
????if(i1==1)?{
????	System.out.println("車輛名稱???車輛類型???載客量/人???載貨量/噸???租金/每天");
????	huo1.show("1,奧迪",?"貨車",?2,?3,?100);
????	huo2.show("2,奧拓",?"貨車",?2,?2,?80);
????	ke1.show("3,寶馬",?"客車",?4,?0,?150);
????	ke2.show("4,一汽",?"客車",?4,?0,?100);
????	pi1.show("5,五菱",?"兩用",?8,?2,?80);
????	pi2.show("6,奔馬",?"兩用",?2,?3,?60);
????	System.out.println("請您選擇租車數(shù)量：");
????	Scanner?input2=new?Scanner(System.in);
????	??int?i2=input2.nextInt();
????	??for(int?i=1;i<i2+1;i++)?{
????		??System.out.println("請輸入您要租用的第"+i+"輛車的編號");
????		??Scanner?input3=new?Scanner(System.in);
????		????i3=input3.nextInt();
????		??if(i3<0||i3>6)?{
????			??System.out.println("請檢查您輸入的編號是否正確！");
????			??break;
????		??}else?{
????		??if(i3==1)?{
????			sum=sum+100;
????		??}
????		??if(i3==2)?{
????			??sum=sum+80;
????		??}
????		??if(i3==3)?{
????			??sum=sum+150;
????			??}if(i3==4)?{
????				??sum=sum+100;
????			??}
????			??if(i3==5)?{
????				??sum=sum+80;
????			??}if(i3==6)?{
????				??sum=sum+60;
????			??}}
????			?
????	??}if(i3>0&&i3<7)?{
????	???System.out.println("請輸入租用的天數(shù)");
????	??Scanner?input4=new?Scanner(System.in);
????	??int?sum1=input4.nextInt();
????	??sum=sum*sum1;
????	??System.out.println("總共租車："+i2+"輛，租用："+sum1+"天，共需："+sum+"元人民幣。");
????	??}else?{
????		??System.out.println("請重新操作！");
????	??}?}else?{
????	System.out.println("感謝使用該系統(tǒng)！");
????}
????
????
	}

}

我自己感覺很簡單粗暴。