用笨办法写的作业 有老师或大大看看达标不？

我用笨办法写的 写了5个类 

一个父类 五个子类 一个main类 想知道如何能优化 更省代码省空间呢?

如下：

父类 Transp

public class Transp {

public String transpName;

public String transpStyle;

public int transpNum;

public String getTranspName() {

return transpName;

}

public void setTranspName(String transpName) {

this.transpName = transpName;

}

public String getTranspStyle() {

return transpStyle;

}

public void setTranspStyle(String transpStyle) {

this.transpStyle = transpStyle;

}

public int getTranspNum() {

return transpNum;

}

public void setTranspNum(int transpNum) {

this.transpNum = transpNum;

}

public void setFields() {

setTranspName(null);

setTranspStyle(null);

setTranspNum(0);

}

}

子类 Bus

public class Bus extends Transp {

public void setFields() {

setTranspName("Bus");

setTranspStyle("land");

setTranspNum(40);

}

}

子类 Plane

public class Plane extends Transp {

public void setFields() {

setTranspName("Plane");

setTranspStyle("air");

setTranspNum(100);

}

}

子类 Ship

public class Ship extends Transp {

public void setFields() {

setTranspName("Ship");

setTranspStyle("sea");

setTranspNum(200);

}

}

子类 SpacePlane

public class SpacePlane extends Transp {

public void setFields() {

setTranspName("SpacePlane");

setTranspStyle("spcace");

setTranspNum(20);

}

}

子类 Train

public class Train extends Transp {

public void setFields() {

setTranspName("Train");

setTranspStyle("rail");

setTranspNum(500);

}

}

main类

import java.util.Scanner;

public class mainTransp {

public static void main(String[] args) {

double scannerNum;

Scanner input = new Scanner(System.in);

for (int i = 0; i < 6; i++) {

System.out.println("请输入查询序号:  1为Bus 2为Plane 3为Ship 4为SpacePlane 5为Train 0为查询所有");

scannerNum = input.nextDouble();

if (scannerNum < 0 || scannerNum > 5 || scannerNum != (int) scannerNum) {

System.out.println("输入有误 请重新输入！");

continue;

} else {

if (scannerNum == 1 || scannerNum == 0) {

Bus set = new Bus();

set.setFields();

System.out.println("运输方式：" + set.getTranspName() + "\n运输路线为：" + set.getTranspStyle() + "\n运送人数为："

+ set.getTranspNum() + "\n");

if (scannerNum != 0) {

break;

}

}

if (scannerNum == 2 || scannerNum == 0) {

Plane set = new Plane();

set.setFields();

System.out.println("运输方式：" + set.getTranspName() + "\n运输路线为：" + set.getTranspStyle() + "\n运送人数为："

+ set.getTranspNum() + "\n");

if (scannerNum != 0) {

break;

}

}

if (scannerNum == 3 || scannerNum == 0) {

Ship set = new Ship();

set.setFields();

System.out.println("运输方式：" + set.getTranspName() + "\n运输路线为：" + set.getTranspStyle() + "\n运送人数为："

+ set.getTranspNum() + "\n");

if (scannerNum != 0) {

break;

}

}

if (scannerNum == 4 || scannerNum == 0) {

SpacePlane set = new SpacePlane();

set.setFields();

System.out.println("运输方式：" + set.getTranspName() + "\n运输路线为：" + set.getTranspStyle() + "\n运送人数为："

+ set.getTranspNum() + "\n");

if (scannerNum != 0) {

break;

}

}

if (scannerNum == 5 || scannerNum == 0) {

Train set = new Train();

set.setFields();

System.out.println("运输方式：" + set.getTranspName() + "\n运输路线为：" + set.getTranspStyle() + "\n运送人数为："

+ set.getTranspNum() + "\n");

if (scannerNum != 0) {

break;

}

}

break;

}

}

}

}

运行后需要获取输入数字 是0-5的整数则相应的输出对应的交通工具和运送人数  0为输出所有  错误数字有提示

输入0 运行如下：

请输入查询序号:  1为Bus 2为Plane 3为Ship 4为SpacePlane 5为Train 0为查询所有

0

运输方式：Bus

运输路线为：land

运送人数为：40

运输方式：Plane

运输路线为：air

运送人数为：100

运输方式：Ship

运输路线为：sea

运送人数为：200

运输方式：SpacePlane

运输路线为：spcace

运送人数为：20

运输方式：Train

运输路线为：rail

运送人数为：500

有老师指点一下吗 谢谢