Replacement Array是一个元素数组。
格式字符串包含转换说明符％s，后跟可选的索引说明符[1]，后跟可选的长度说明符：3。
格式字符串：％s [1]：3
%s is conversion specifier - mark the starting of conversion string
[1] is index specifier - corresponding index of Replacement Array
:3 is length specifier - number of characters to be taken from string
替换工作如下： 例如：
Replacement Array: Smart site India comparison Best
Format String: %sprix is the %s[4] online %s[3]:6 shopping %s:9 in %s
Output: Smartprix is the Best online compar shopping site in India.
If no index specifier is present with conversion specifier %s, Index 0, 1, 2, 3... are assigned to all in sequence from left to right.
In above example %sprix is %s[0]prix; %s:9 is %s[1]:9 and so on.
The specifier string is replaced by element of Replacement Array denoted by index specifier. If no element is found the specifier is not replaced.
In above example %s[4] is replaced by element at 4th index of the Replacement Array "Best". %sprix is replaced by Smartprix and so on.
%s[3]:6 is replaced by 'first 6 characters' of the element at 3rd index of the Replacement Array, i.e., "compar".
If the 'length specifier' is not present or is greater than length of the element then use whole string.
%s:9 is replaced by site, %s[4] is replaced by Best.
For any error case, specifier is not replaced.
输入：
输入中将有2行。
1st line contains space separated elements of Replacement Array
2nd line is Format String
输出：
Formatted String
示例1：
输入：
智能网站印度比较最佳 ％sprix是％s [4]在线％s [3]：6％s％：9％s。
输出：
Smartprix是印度最好的在线比赛购物网站。
示例2：
输入：
印度繁荣启动中心 ％s％s [是] a％唱％s：5％s：5％s [4]。 ％s [6]是：％s [-1]。
输出：
印度％s是一个蓬勃发展的创业中心。 ％s [6]是：％s [-1]。
答案 0 :(得分：1)
希望这适用于所有测试用例
package com.test.formatStrings;
import java.util.ArrayList;
import java.util.Scanner;
public class FormatStrings {
public static void main(String args[])throws Exception
{
Scanner sc= new Scanner(System.in);
String input_elements;
String replacement;
StringBuilder input_string=new StringBuilder();
//String output;
int lastindex1=0, count=0, lastindex2=0;
ArrayList<String> arrayElements= new ArrayList<String>();
System.out.println("Enter the array of elements");
input_elements= sc.nextLine();
System.out.println(input_elements);
for(String str: input_elements.split(" "))
{
arrayElements.add(str);
}
System.out.println("Enter the input String");
input_string.append(sc.nextLine());
int length=input_string.length();
for(int i=0;i<length;i++)
{
if(input_string.charAt(i)=='%')
{
int first_index=i;
if(input_string.charAt(i+1)=='s')
{
if(i+2<input_string.length() && input_string.charAt(i+2)=='[')
{
if(Character.isLetter(input_string.charAt(i+3))!=true && Character.getNumericValue(input_string.charAt(i+3))>-1)
{
int ArrayList_firstIndex=Character.getNumericValue(input_string.charAt(i+3));
if(input_string.charAt(i+4)==']')
{
if(input_string.charAt(i+5)==':')
{
if(Character.isLetter(input_string.charAt(i+6))!=true && Character.getNumericValue(input_string.charAt(i+6))>-1)
{
int ArrayList_lastIndex=Character.getNumericValue(input_string.charAt(i+6));
replacement=arrayElements.get(ArrayList_firstIndex).substring(0, ArrayList_lastIndex);
int last_index=i+6;
input_string.replace(first_index,last_index+1 , replacement);
length=input_string.length();
i=0;
}
}
else
{
if(ArrayList_firstIndex>arrayElements.size())
{
continue;
}
else
{
replacement=arrayElements.get(ArrayList_firstIndex);
input_string.replace(first_index, first_index+5, replacement);
length=input_string.length();
i=0;
}
}
}
}
}
else if(i+2<input_string.length() && input_string.charAt(i+2)==':')
{
if(Character.isLetter(input_string.charAt(i+3))!=true && Character.getNumericValue(input_string.charAt(i+3))>-1)
{
int ArrayList_lastIndex=Character.getNumericValue(input_string.charAt(i+3));
if(ArrayList_lastIndex>arrayElements.get(count).length())
{
replacement=arrayElements.get(count);
}
else
{
replacement=arrayElements.get(count).substring(0, ArrayList_lastIndex);
}
count++;
input_string.replace(first_index,first_index+4 , replacement);
length=input_string.length();
i=0;
}
}
else
{
replacement=arrayElements.get(count);
count++;
input_string.replace(first_index,first_index+2,replacement);
length=input_string.length();
i=0;
}
}
else
{
continue;
}
}
else
{
continue;
}
}
System.out.println(input_string);
sc.close();
}
}