Java Utililty Methods Long Number Create

List of utility methods to do Long Number Create

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Description

The list of methods to do Long Number Create are organized into topic(s).

Method

longtoLong(final String bitString)
Convert a bit string into a long value. 
assert (bitString.length() <= Long.SIZE);
long value = 0;
for (final char ch : bitString.toCharArray()) {
    if (ch == '1') {
        value = value << 1;
        value = value | 1;
    } else if (ch == '0') {
        value = value << 1;
...
longtoLong(final String str, final long defaultValue)

Convert a String to a long, returning a default value if the conversion fails.

If the string is null, the default value is returned.

 NumberUtils.toLong(null, 1L) = 1L NumberUtils.toLong("", 1L)   = 1L NumberUtils.toLong("1", 0L)  = 1L 
if (str == null) {
    return defaultValue;
try {
    return Long.parseLong(str);
} catch (final NumberFormatException nfe) {
    return defaultValue;
LongtoLong(final String value)
Converts a String to a long plus if the String is NULL, the returned value will be NULL. 
if (value == null) {
    return null;
return Long.valueOf(value);
LongtoLong(final String value)
create Long from str. 
return Long.parseLong(value);
longtoLong(final String value)
To long. 
if (value == null) {
    return 0L;
String szTemp = "";
for (int i = 0; i < value.length(); i++)
    if (value.charAt(i) != ',') {
        szTemp = szTemp + value.charAt(i);
try {
    final double dd = Double.parseDouble(szTemp);
    final long l1 = (long) dd;
    return l1;
} catch (final NumberFormatException e) {
    final long l = 0L;
    return l;
byte[]toLong(int numBytes, long value)
Big endian. 
byte val[] = new byte[numBytes];
toLong(val, 0, numBytes, value);
return val;
longtoLong(int value)
Returns the value of the given int as a long , when treated as unsigned. 
return value & INT_MASK;
longtoLong(int x, int z)
Shift two int's together to form a compund key 
return ((long) x << 32) + z - Integer.MIN_VALUE;
long[]toLong(int[] a)
to Long 
long[] b = new long[a.length];
for (int i = 0; i < a.length; i++) {
    b[i] = a[i];
return b;
longtoLong(int[] x, int length, int M)
to Long 
long a = 0;
for (int i = 0; i < length; i++) {
    a |= ((long) x[i] << (M * i));
return a;