帮忙看看代码哪里错了？
lucitas
2016-03-09 18:40
public void test2(){
List<String> StringList=new ArrayList<String>();
Random random=new Random();
char [] charArray=("0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ").toCharArray();
for(int j=0;j<10;j++){
StringBuilder sb=new StringBuilder();
do{
for(int i=0;i<random.nextInt(10)+1;i++){
sb.append(charArray[random.nextInt(62)]);
}
StringList.add(sb.toString());
}
while(StringList.contains(sb.toString()));
}
System.out.println("*********排序前*********");
for (String string : StringList) {
System.out.println(string);
}
System.out.println("********排序后***********");
Collections.sort(StringList);
for (String string : StringList) {
System.out.println(string);
}
}3回答
-
- Zhr1990
- 2016-03-09 19:23:57
12行不对，应该放到14行的后面
-
- Zhr1990
- 2016-03-09 20:45:52
内层for循环好像不对。。看看我写的吧
public class RandomStr {
public List<String> list = new ArrayList<String>();
String str="abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
Random random=new Random();
public static void main(String[] args) {
RandomStr rm = new RandomStr();
rm.sortStr(rm.addStr());
}
//生成字符串集合
List<String> addStr(){
for(int i=0;i<10;i++){
StringBuilder sb = new StringBuilder();
int tmp = 0;
char ch;
do{
tmp = random.nextInt(10);
}while(tmp==0);
for(int j=0;j<tmp;j++){
do{
ch = str.charAt(random.nextInt(str.length()));
}while(list.contains(sb));
sb.append(ch);
}
list.add(sb.toString());
}
return list;
}
//排序字符串集合
void sortStr(List<String> list){
System.out.println("=====排序前的顺序=====");
for(String str:list){
System.out.print(str+"-");
}
Collections.sort(list);
System.out.println();
System.out.println("=====排序后的顺序=====");
for(String str:list){
System.out.print(str+"-");
}
}
} -
- Zhr1990
- 2016-03-09 19:44:59
你还是先看看do...while语句吧，这个程序的执行过程你还没有弄明白
Java入门第三季
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