回答編集履歴
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修正
answer
CHANGED
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@@ -1,5 +1,4 @@
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以下のコードでできると思います
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-
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```java
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4
3
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import java.io.*;
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5
4
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import java.util.*;
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@@ -14,7 +13,7 @@
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14
13
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15
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public static void main(String[] args){
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15
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try(BufferedReader br=new BufferedReader(new FileReader("C1.csv"))){
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16
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try(BufferedReader br=new BufferedReader(new FileReader("C1.csv"))){
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int count=0;
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String data=null;
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int flag=0;
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@@ -87,8 +86,12 @@
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87
86
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88
87
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//書き出し
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89
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90
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-
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89
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if(flag==0){
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91
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Collections.sort(st,new Sorts());
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91
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}
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92
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if(flag==1){
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93
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Collections.sort(st,new Sorts2());
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}
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for(Data as:st){
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@@ -125,4 +128,16 @@
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125
128
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126
129
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}
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131
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+
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132
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+
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133
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class Sorts2 implements Comparator<Data>{
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134
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135
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public int compare(Data d1,Data d2){
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136
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137
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return d2.id.compareTo(d1.id);
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138
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+
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139
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}
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140
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+
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141
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+
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142
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}
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128
143
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```
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