剔除数组中指定的某条记录

删除数组中指定的某条记录
请大大们先看代码：

Java code

    private CommunityEntity[] commArr;    public DbStore() //初始化用户实体数组    {        CommunityEntity com1 = new CommunityEntity();        com1.setCommId("001");        com1.setCommName("新升新苑");        com1.setCommManager("大漠");        com1.setCommArea("高新区");        com1.setCommStatue("可放装");        com1.setPermeability(61);        com1.setUserCount(221);                CommunityEntity com2 = new CommunityEntity();        com2.setCommId("002");        com2.setCommName("新盛花园");        com2.setCommManager("大漠");        com2.setCommArea("吴中区");        com2.setCommStatue("可放装");        com2.setPermeability(62);        com2.setUserCount(222);                CommunityEntity com3 = new CommunityEntity();        com3.setCommId("003");        com3.setCommName("新唯家园");        com3.setCommManager("大漠");        com3.setCommArea("工业园区");        com3.setCommStatue("可放装");        com3.setPermeability(63);        com3.setUserCount(223);                CommunityEntity com4 = new CommunityEntity();        com4.setCommId("004");        com4.setCommName("蠡东花园");        com4.setCommManager("大漠");        com4.setCommArea("相城区");        com4.setCommStatue("可放装");        com4.setPermeability(64);        com4.setUserCount(224);                CommunityEntity com5 = new CommunityEntity();        com5.setCommId("005");        com5.setCommName("朱家庄新村");        com5.setCommManager("大漠");        com5.setCommArea("金阊区");        com5.setCommStatue("可放装");        com5.setPermeability(65);        com5.setUserCount(225);         setCommArr(new CommunityEntity[]{com1,com2,com3,com4,com5});    }    public void setCommArr(CommunityEntity[] commArr)     {        this.commArr = commArr;    }    public CommunityEntity[] getCommArr()    {        return commArr;    }        

现在我要写一个方法，删除指定的某条记录，要如何实现？

Java code

import java.util.Scanner;import User.DbStore;public class CommunityManager {    public static void main(String args[])    {        delete();    }    public static void delete()    {        DbStore abcd = new DbStore();        Scanner scan = new Scanner(System.in);        System.out.println("请输入要删除的社区编号");        String deletingId = scan.next();        boolean judge = false;        for(int i=0;i<abcd.getCommArr().length;i++)        {            if(abcd.getCommArr()[i].getCommId().equals(deletingId))            {                System.out.println("您要删除的社区编号是："+deletingId);                judge = true;                break;            }        }        if(!judge)        {            System.out.println("该社区不存在！");        }    }}

[解决办法]
你可以不使用数组来保存JavaBean而是用List 这是JAVA推荐的解决方案，删除会很方便

如果一定要用数组或者返回数组，那么也用List最后转换为数组就OK了

你这里使用数组又回到C语言的时代了，删除一个数组元素 你是要后面元素全部前移么？还是只是做个标记删除？如果是前者那就费事了，后者你设置那个元素内容为null做个标记就OK
[解决办法]

探讨

你可以不使用数组来保存JavaBean而是用List 这是JAVA推荐的解决方案，删除会很方便

如果一定要用数组或者返回数组，那么也用List最后转换为数组就OK了

你这里使用数组又回到C语言的时代了，删除一个数组元素 你是要后面元素全部前移么？还是只是做个标记删除？如果是前者那就费事了，后者你设置那个元素内容为null做个标记就OK

[解决办法]

探讨

引用:
你可以不使用数组来保存JavaBean而是用List 这是JAVA推荐的解决方案，删除会很方便

如果一定要用数组或者返回数组，那么也用List最后转换为数组就OK了

你这里使用数组又回到C语言的时代了，删除一个数组元素 你是要后面元素全部前移么？还是只是做个标记删除？如果是前者那就费事了，后者你设置那个元素内容为null做个标记就OK
……

[解决办法]

Java code

import java.util.Arrays;public class Test {        public int[] remove(int[] array,int index){        int[] temp=new int[array.length-1];        System.arraycopy(array, 0, temp, 0, index);        System.arraycopy(array, index+1, temp, index, array.length-1-index);        return temp;    }        public static void main(String[] args) {        int[] array={2,5,3,7,4};        int[] temp=new Test().remove(array, 3);        System.out.println(Arrays.toString(temp));    }}打印结果是：[2, 5, 3, 4]
[解决办法]
Java code
package com.commd;public class CommunityManager {    private CommunityEntity[] commArr;    private int len=0;         public CommunityManager(int max) //初始化用户实体数组        {             commArr=new CommunityEntity[max];            CommunityEntity com1 = new CommunityEntity();            com1.setCommId("001");            com1.setCommName("新升新苑");            com1.setCommManager("大漠");            com1.setCommArea("高新区");            com1.setCommStatue("可放装");            com1.setPermeability(61);            com1.setUserCount(221);            insert(com1);                        CommunityEntity com2 = new CommunityEntity();            com2.setCommId("002");            com2.setCommName("新盛花园");            com2.setCommManager("大漠");            com2.setCommArea("吴中区");            com2.setCommStatue("可放装");            com2.setPermeability(62);            com2.setUserCount(222);            insert(com2);                        CommunityEntity com3 = new CommunityEntity();            com3.setCommId("003");            com3.setCommName("新唯家园");            com3.setCommManager("大漠");            com3.setCommArea("工业园区");            com3.setCommStatue("可放装");            com3.setPermeability(63);            com3.setUserCount(223);            insert(com3);                        CommunityEntity com4 = new CommunityEntity();            com4.setCommId("004");            com4.setCommName("蠡东花园");            com4.setCommManager("大漠");            com4.setCommArea("相城区");            com4.setCommStatue("可放装");            com4.setPermeability(64);            com4.setUserCount(224);            insert(com4);                        CommunityEntity com5 = new CommunityEntity();            com5.setCommId("005");            com5.setCommName("朱家庄新村");            com5.setCommManager("大漠");            com5.setCommArea("金阊区");            com5.setCommStatue("可放装");            com5.setPermeability(65);            com5.setUserCount(225);            insert(com5);//             setCommArr(new CommunityEntity[]{com1,com2,com3,com4,com5});        }        public void setCommArr(CommunityEntity[] commArr)         {            this.commArr = commArr;        }        public CommunityEntity[] getCommArr()        {            return commArr;        }                public void insert(CommunityEntity value)        {            commArr[len++]=value;        }                public void deleteCommunityById(String commId)        {            for(int i=0;i<len;i++)            {                CommunityEntity ce=commArr[i];                if(ce.getCommId().equals(commId))                {                    for(int k=i;k<len;k++)                    {                        commArr[i]=commArr[i+1];                    }                    len--;                    return;                }                                            }                    }                public void showCommunity()        {            for(int i=0;i<len;i++)            {                CommunityEntity ce=commArr[i];                System.out.println(ce.getCommId()+" "+ce.getCommName());            }        }        public static void main(String[] args) {            CommunityManager cm=new CommunityManager(5);            cm.deleteCommunityById("001");            cm.showCommunity();        }} 
 
[解决办法]
探讨

完全不懂list。还没学到。

[解决办法]
把数组转换成LIST  然后重新创建一个List  进行删除操作 最后把List再转回数组

仅供参考：
Java code
String [] strs = new String[]{"1","2","3","4"};        @SuppressWarnings("rawtypes")        List list = Arrays.asList(strs);        @SuppressWarnings("rawtypes")        List list2 = new ArrayList<String>(list);        list2.add("1");        System.out.println(list2);        @SuppressWarnings("unused")        Object[] str2 = list2.toArray();        String str3 = (String) str2[0];        System.out.println(str3); 

 

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