日常交作業(yè)
List<String> stringList = new ArrayList<String>();
for(int i=0;i<10;i++) {
StringBuilder sb = new StringBuilder();? //用于存儲每一個字符串
int length = (int)(Math.random()*10);? //字符串長度隨機(jī)
do {
for(int j=0;j<length;j++) {
int num;
char numChar;
do{
num = (int)(Math.random()*(123-48)+48);? // 隨機(jī)生成[48,122]之間的數(shù)值
numChar = (char)num;
}while(!(num>=48 && num<=57 || num>=65 && num<=90 || num>=97 && num<=122));? //?字符'0'-'9','A'-'Z','a'-'z'對應(yīng)的數(shù)
sb.append(numChar);
}
}while(stringList.contains(sb.toString()));? //保證字符串不重復(fù)
System.out.println("添加第"+(i+1)+"個字符串："+sb.toString());
stringList.add(sb.toString());
}
System.out.println("-------排序前-------");
for(String string:stringList) {
System.out.println("元素："+string);
}
Collections.sort(stringList);
System.out.println("-------排序后-------");
for(String string:stringList) {
System.out.println("元素："+string);
}
