Double.valueOf(s) Double.TYPE Double (Java Platform SE 7 ) the javadoc public static doubleToLongBits() parseDouble Double.TYPE parseDouble Double public static double parseDouble(String s) doubleToLongBits parseDouble() Double.longBitsToDouble Javadoc for Double.MIN_VALUE comparison function Double.compare() API docs doubleValue() toString(double d) toString(double d) compareTo() public static Double valueOf(String s) Double#valueOf Double the docs doubleToLongBits Java Platform Specification Double.TYPE Double Double API docs Double (Java Platform SE 7 ) Double (Java Platform SE 7 ) Double.NaN Double Double.isNaN() Double parseDouble() Double docs.oracle.com/javase/7/docs/api/java/lang/Double.html Double Double Double#parseDouble Javadoc for Double.MIN_VALUE Double.hashCode() Javadoc for Double.MIN_VALUE compareTo() doubleToLongBits Double compare(double, double) Javadoc for Double.MIN_VALUE doubleValue() Double Double.parseDouble parseDouble Double (Java Platform SE 7 ) parseDouble() Double doubleValue() compare(double, double) parseDouble() API docs Double Double Double Double.parseDouble(String s) Double.TYPE Double (Java Platform SE 7 ) the docs Double compareTo() Double Double Double (Java Platform SE 7 ) parseDouble toString(double d) Double parseDouble Double toString(double d) Double