这两行代码什么是什么意思int cursor=random.nextInt(a.length()); sb.append(a.charAt(cursor));
public class CollectionTest {
/**
* @param args
*/
List<String> stringList=new ArrayList<String>();
public void testSort(){
String a="abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
Random random=new Random();
//String s;
for(int i=0;i<10;i++){
StringBuilder sb=new StringBuilder();
do{
sb.delete(0, sb.length());
int strlen=random.nextInt(10)+1;
//if(strlen==0)continue;
for(int k=0;k<=strlen;k++) {
int cursor=random.nextInt(a.length());
sb.append(a.charAt(cursor));
}
}while(stringList.contains(sb.toString()));
stringList.add(sb.toString());
}
System.out.println("---------排序前------------");
for(String str:stringList) {
System.out.println("序列"+str);
}
Collections.sort(stringList);
System.out.println("-----排序后----------");
for(String str:stringList) {
System.out.println("序列"+str);
}
}
public static void main(String[] args) {
// TODO Auto-generated method stub
CollectionTest ec=new CollectionTest();
ec.testSort();
}
