package 学生成绩管理;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;
class Sp {
private String bianhao;
private String mingcheng;
private double jiage;
Sp(String bianhao,String mingcheng,double jiage)
{
this.bianhao=bianhao;
this.mingcheng=mingcheng;
this.jiage=jiage;
}
public String getBianhao() {
return bianhao;
}
public void setBianhao(String bianhao) {
this.bianhao = bianhao;
}
public String getMingcheng() {
return mingcheng;
}
public void setMingcheng(String mingcheng) {
this.mingcheng = mingcheng;
}
public double getJiage() {
return jiage;
}
public void setJiage(double jiage) {
this.jiage = jiage;
}
}
class Spg
{
ArrayList<Object> aa=null;
Scanner in=null;
Spg()
{
aa=new ArrayList();
in=new Scanner(System.in);
}
public void addsp(Sp Sp)
{
aa.add(Sp);
System.out.println("增加成功");
}
public void spxx(String bh)
{
int i;
int c=aa.size();
for(i=0;i<c;i++)
{
Sp sr=(Sp)aa.get(i);
if(sr.getBianhao().equals(bh))
{
System.out.println("信息如下：");
System.out.println("食品编号:"+sr.getBianhao());
System.out.println("食品名称:"+sr.getMingcheng());
System.out.println("食品价格:"+sr.getJiage());
}
}
if(i==c)
{
System.out.println("输入有误");
}
}
public void delsp(String bh)
{
int i;
if(aa.size()==0)
{
System.out.println("没有信息");
}
for(i=0;i<aa.size();i++)
{
Sp sr=(Sp)aa.get(i);
if(sr.getBianhao().equals(bh))
{
aa.remove(i);
}
}
if(i==aa.size()&&aa.size()!=0)
{
System.out.println("输入有误");
}
}
public void setsp(String bh)
{
int i;
for(i=0;i<aa.size();i++)
{
Sp sr=(Sp)aa.get(i);
if(sr.getBianhao().equals(bh))
{
System.out.println("请输入新的名称");
String c=in.next();
sr.setBianhao(c);
System.out.println("请输入新的价格");
double a=in.nextDouble();
sr.setJiage(a);
//aa.remove(i,bh);
}
}
if(i==aa.size()&&aa.size()!=0)
{
System.out.println("输入有误");
}
}
public void exitsp()
{
System.out.println("谢谢使用");
System.exit(0);
}
public void addsp(String bh, String mg, double jg) {
// TODO Auto-generated method stub
}
}
public class Lianxi2
{
public static void main(String []args) throws IOException
{
Spg gl=new Spg();
BufferedReader sr=new BufferedReader(new InputStreamReader(System.in));
while(true)
{
System.out.println("请按如下提示操作：");
System.out.println("按1增添食品种类");
System.out.println("按2查询食品");
System.out.println("按3删除食品");
System.out.println("按4修改食品");
System.out.println("按0退出系统");
String srt=sr.readLine();
if(srt.equals("1"))
{
System.out.println("请添加食品名称");
String mg=sr.readLine();
System.out.println("请添加食品编号");
String bh=sr.readLine();
System.out.println("请添加食品价格");
double jg=Double.parseDouble(sr.readLine());
gl.addsp(bh,mg,jg);
}else if(srt.equals("2"))
{
System.out.println("请输入食品编号");
String bh=sr.readLine();
gl.spxx(bh);
}else if(srt.equals("3"))
{
System.out.println("请输如食品编号");
String bh=sr.readLine();
gl.delsp( bh);
}else if(srt.equals("4"))
{
System.out.println("请输如食品编号");
String bh=sr.readLine();
gl.setsp( bh);这里的方法发现根本无法使用，求大神指点错误
}else if(srt.equals("0"))
{;
gl.exitsp( );
}
}
}
}
ziom
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