root / src / utils / Utils.java @ 2
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| 1 | 2 | up20150644 | package utils; |
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| 2 | |||
| 3 | import java.io.File; |
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| 4 | import java.io.IOException; |
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| 5 | |||
| 6 | /**
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| 7 | * Utils
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| 8 | */
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| 9 | public class Utils { |
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| 10 | |||
| 11 | public static boolean isInteger(String s) { |
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| 12 | if (s.isEmpty())
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| 13 | return false; |
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| 14 | for (int i = 0; i < s.length(); i++) { |
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| 15 | if (i == 0 && s.charAt(i) == '-') { |
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| 16 | if (s.length() == 1) |
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| 17 | return false; |
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| 18 | else
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| 19 | continue;
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| 20 | } |
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| 21 | if (Character.digit(s.charAt(i), 10) < 0) |
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| 22 | return false; |
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| 23 | } |
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| 24 | return true; |
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| 25 | } |
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| 26 | |||
| 27 | public static boolean fileExists(String filePath) { |
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| 28 | return new File(filePath).isFile(); |
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| 29 | } |
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| 30 | |||
| 31 | public static boolean isFloat(String s) { |
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| 32 | return s.matches("[0-9]*\\.?[0-9]+"); |
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| 33 | } |
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| 34 | |||
| 35 | public static boolean deleteDirectoryRecursively(File file) /*throws IOException */{ |
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| 36 | |||
| 37 | File[] files = file.listFiles(); |
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| 38 | if(files!=null) { |
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| 39 | for(File f: files) { |
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| 40 | if(f.isDirectory()) {
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| 41 | deleteDirectoryRecursively(f); |
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| 42 | } else {
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| 43 | f.delete(); |
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| 44 | } |
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| 45 | } |
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| 46 | } |
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| 47 | return file.delete();
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| 48 | } |
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| 49 | } |