小白一枚，希望大家可以指出不足之處
public void testsort3(){
List<String> list = new ArrayList<String>();
Random random = new Random();
String k = null;
for(int i = 0;i < 10;i++){
String base = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"; ? ? ? ?
? ?StringBuffer sb = new StringBuffer();
? ?do{
? ?for (int j = 0; j < random.nextInt(10); j++) { ? ??
? ? ? ?
? ? ? ? int number = random.nextInt(base.length()); ? ??
? ? ? ? ? ?sb.append(base.charAt(number));
? ? ? ? ? ?k = sb.toString();
? ? ? ?}
? ? ? }while(list.contains(k));
? ? ? ?list.add(k);
? ? ? ?System.out.println("添加字符串："+k);?
? }
System.out.println("排序前：");
for (String string : list) {
System.out.println(string);
}
Collections.sort(list);
System.out.println("排序后：");
for (String string : list) {
System.out.println(string);
}
}
2015-12-27
String base = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"; ? ?最好放在第一個for循環(huán)的外面
StringBuffer sb = new StringBuffer(); ?分成兩步，StringBuffer sb ?實例化是不是應(yīng)該放在do里面會好一點