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| | | *
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| | | */
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| | | public class FileUtils {
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| | | |
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| | | /** 1024 (number of bytes in one kilobyte) */
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| | | public static final int KB = 1024;
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| | |
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| | | /** 1024 {@link #KB} (number of bytes in one megabyte) */
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| | | public static final int MB = 1024 * KB;
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| | |
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| | | /** 1024 {@link #MB} (number of bytes in one gigabyte) */
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| | | public static final int GB = 1024 * MB;
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| | |
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| | | /**
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| | | * Returns an int from a string representation of a file size.
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| | | * e.g. 50m = 50 megabytes
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| | | * |
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| | | * @param aString
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| | | * @param defaultValue
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| | | * @return an int value or the defaultValue if aString can not be parsed
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| | | */
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| | | public static int convertSizeToInt(String aString, int defaultValue) {
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| | | return (int) convertSizeToLong(aString, defaultValue);
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| | | }
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| | | |
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| | | /**
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| | | * Returns a long from a string representation of a file size.
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| | | * e.g. 50m = 50 megabytes
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| | | * |
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| | | * @param aString
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| | | * @param defaultValue
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| | | * @return a long value or the defaultValue if aString can not be parsed
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| | | */
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| | | public static long convertSizeToLong(String aString, long defaultValue) {
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| | | // trim string and remove all spaces |
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| | | aString = aString.toLowerCase().trim();
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| | | StringBuilder sb = new StringBuilder();
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| | | for (String a : aString.split(" ")) {
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| | | sb.append(a);
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| | | }
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| | | aString = sb.toString();
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| | | |
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| | | // identify value and unit
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| | | int idx = 0;
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| | | int len = aString.length();
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| | | while (Character.isDigit(aString.charAt(idx))) {
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| | | idx++;
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| | | if (idx == len) {
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| | | break;
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| | | }
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| | | }
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| | | long value = 0;
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| | | String unit = null;
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| | | try {
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| | | value = Long.parseLong(aString.substring(0, idx));
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| | | unit = aString.substring(idx);
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| | | } catch (Exception e) {
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| | | return defaultValue;
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| | | }
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| | | if (unit.equals("g") || unit.equals("gb")) {
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| | | return value * GB;
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| | | } else if (unit.equals("m") || unit.equals("mb")) {
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| | | return value * MB;
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| | | } else if (unit.equals("k") || unit.equals("kb")) {
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| | | return value * KB;
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| | | }
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| | | return defaultValue;
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| | | }
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| | |
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| | | /**
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| | | * Returns the string content of the specified file.
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|---|
