numeric string Double.TYPE Java Platform Specification Double For example, Java has the same implementation java.lang.Double Double.parseDouble(String s) Double#parseDouble() JavaDoc Double.TYPE Double Javadoc for Double.valueOf() Double.parseDouble(...) double double Double.compare() java.lang.Double java.lang.Double double Official Java Documentation Double documentation Double.TYPE Double.TYPE Double.TYPE Double#valueOf() JavaDoc java.lang.Double double double Double.TYPE Double.TYPE double Double Double.TYPE java.lang.Double#valueOf(String) Double Platform Specification numeric string Double.TYPE Double Double.NaN