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  1. import java.util.*;
  2. import java.lang.*;
  3. import java.io.*;
  4.  
  5. class Ideone {
  6.   public static String inspect(final String str) {
  7.     StringBuilder result = new StringBuilder("\"");
  8.     for (int i = 0; i < str.length(); i++) {
  9.       final char ch = str.charAt(i);
  10.       if      (ch >= 128) result.append(String.format("\\u%04x", (int) ch));
  11.       else if (ch == '"') result.append("\\\"");
  12.       else if (ch >=  32) result.append(ch);
  13.       else switch (ch) {
  14.         case '\b':        result.append("\\b"); break;
  15.         case '\f':        result.append("\\f"); break;
  16.         case '\n':        result.append("\\n"); break;
  17.         case '\r':        result.append("\\r"); break;
  18.         case '\t':        result.append("\\t"); break;
  19.         default:        final int iNext = i + 1;
  20.                         if (iNext == str.length())
  21.                           result.append(String.format("\\%o", (int) ch));
  22.                         else {
  23.                           final char nextCh = str.charAt(iNext);
  24.                           result.append(String.format((nextCh >= '0' && nextCh <= '9') ? "\\%03o" : "\\%o", (int) ch));
  25.                         }
  26.       }
  27.     }
  28.     result.append("\"");
  29.     return result.toString();
  30.   }
  31.  
  32.   public static String getRemainingScannerContents(final Scanner scanner) {
  33.     scanner.useDelimiter("\\A");
  34.     return scanner.hasNext() ? scanner.next() : "";
  35.   }
  36.  
  37.   public static void main (final String[] args) throws java.lang.Exception {
  38.     Scanner scanner = new Scanner("test\ntest\n12345");
  39.     System.out.println(inspect(getRemainingScannerContents(scanner)));
  40.   }
  41. }
Success #stdin #stdout 0.06s 2184192KB
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stdin
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Standard input is empty
stdout
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"test\ntest\n12345"
https://ideone.com/7gfNUp
language:
Java (HotSpot 12)
created:
7 years ago
visibility:
secret

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