一道java题 求解答
Givenanumbern,youarerequiredtooutputitsuniquedigitsinappearingorder.Thereareseveralte...
Given a number n, you are required to output its unique digits in appearing order. There are several test cases for each test group.
Input: Test case count T following by each test case. Example: 5121212001210000-23
Output:12120012023 展开
Input: Test case count T following by each test case. Example: 5121212001210000-23
Output:12120012023 展开
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package zhidao;
import java.util.Scanner;
public class UniqueDigits
{
public static final String LINE = System.getProperty ("line.separator");
private static String unique ( int start, String input )
{
if (start > input.length () - 1)
{
return input;
}
String head = input.substring (0, start + 1);
String body = start > input.length () - 1 ? "" : input.substring (start + 1);
start++;
if ("".equals (body) || head.contains (body.charAt (0) + ""))
{
return head;
}
return unique (start, input);
}
public static void main ( String[] args )
{
System.out.print ("Given a number n: ");
Scanner scanner = new Scanner (System.in);
int n = scanner.nextInt ();
System.out.println ("Given " + n + " digits strings: ");
int count = 0;
String result = "";
while (count <= n)
{
String line = scanner.nextLine ();
result += unique (0, line) + LINE;
count++;
}
scanner.close ();
System.out.println ("Output:" + result);
}
}
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