Numeric to string conversion is,String.valueof()<\/strong> Use the<\/p>\n\n\n\n There are also other ways to write this.<\/p>\n\n\n\n The final \"\" + num takes advantage of a Java feature that treats numbers as strings when concatenated with strings.<\/p>\n\n\n\n The last approach is the simplest to describe, but if someone who does not have a thorough understanding of Java's characteristics sees it, it will take time to decipher the intent.<\/p>\n\n\n\n String to numeric conversion is,Integer.parseInt()<\/strong> Use the<\/p>\n\n\n\n Note that a NumberFormatException will be thrown if the conversion fails for some reason, such as the presence of characters or a number that does not fit into the type.<\/p>\n\n\n\n Converting a date to a string is a bit more complicated than number to string.<\/p>\n\n\n\n first (of all) SimpleDateFormat<\/strong> Create an instance of Specify the date format when you create it. This will be the format when made into a string.<\/p>\n\n\n\n Finally. SimpleDateFormat.format()<\/strong> to a string.<\/p>\n\n\n\n For string to date conversion,SimpleDateFormat.parse<\/strong> method.<\/p>\n\n\n\n Create a SimpleDateFormat as in the date \u21d2 string case. When created, the date format is specified, which matches the date format of the string to be converted.<\/p>\n\n\n\n Finally. SimpleDateFormat.parse()<\/strong> to convert to a date (Date).<\/p>\n\n\n\n Note that the parse method throws a ParseException, which must be enclosed in a try-catch statement or re-thrown.<\/p>\n\n\n\n Unfortunately, there are no methods designed to convert numbers to dates or dates to numbers. Both need to go through conversion to string once.<\/p>","protected":false},"excerpt":{"rendered":" Converting numbers from strings Use String.valueof() to convert numbers to strings. String [\u2026]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"swell_btn_cv_data":""},"categories":[19],"tags":[],"_links":{"self":[{"href":"https:\/\/chat-messenger.com\/en\/wp-json\/wp\/v2\/posts\/4718"}],"collection":[{"href":"https:\/\/chat-messenger.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/chat-messenger.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/chat-messenger.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/chat-messenger.com\/en\/wp-json\/wp\/v2\/comments?post=4718"}],"version-history":[{"count":7,"href":"https:\/\/chat-messenger.com\/en\/wp-json\/wp\/v2\/posts\/4718\/revisions"}],"predecessor-version":[{"id":8895,"href":"https:\/\/chat-messenger.com\/en\/wp-json\/wp\/v2\/posts\/4718\/revisions\/8895"}],"wp:attachment":[{"href":"https:\/\/chat-messenger.com\/en\/wp-json\/wp\/v2\/media?parent=4718"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/chat-messenger.com\/en\/wp-json\/wp\/v2\/categories?post=4718"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/chat-messenger.com\/en\/wp-json\/wp\/v2\/tags?post=4718"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}String str = String.valueOf(num);<\/pre>\n\n\n\n
String str = Integer.toString(num); String str = "" + num;<\/pre>\n\n\n\n
String \u21d2 Numeric conversion<\/h2>\n\n\n\n
int num = Integer.parseInt(str);<\/pre>\n\n\n\n
Date \u21d2 String conversion<\/h2>\n\n\n\n
sample code<\/h4>\n\n\n\n
public static void main(String[] args) {\n Date date = new Date();\n SimpleDateFormat sdf = new SimpleDateFormat("yyyy\/MM\/dd hh:mm:ss");\n String str = sdf.format(date);\n \n System.out.println("\u65e5\u4ed8\u578b = " + date);\n System.out.println("\u6587\u5b57\u5217 = " + str);\n}<\/code><\/pre><\/div>\n\n\n\nOutput Results:<\/h4>\n\n\n\n
\u65e5\u4ed8\u578b = Sat Nov 02 12:11:55 UTC 2019\n\u6587\u5b57\u5217 = 2019\/11\/02 12:11:55<\/code><\/pre><\/div>\n\n\n\nString \u21d2 Date conversion<\/h2>\n\n\n\n
sample code<\/h4>\n\n\n\n
public static void main(String[] args) {\n try {\n String strDate = "2019\/11\/01 12:34:56";\n \n SimpleDateFormat sdf = new SimpleDateFormat("yyyy\/MM\/dd hh:mm:ss");\n Date date = sdf.parse(strDate);\n \n System.out.println("\u6587\u5b57\u5217 = " + strDate);\n System.out.println("\u65e5\u4ed8\u578b = " + date);\n \n } catch (ParseException e) {\n \/\/\u4f8b\u5916\u51e6\u7406\n }\n}<\/code><\/pre><\/div>\n\n\n\nOutput Results:<\/h4>\n\n\n\n
\u6587\u5b57\u5217 = 2019\/11\/01 12:34:56\n\u65e5\u4ed8\u578b = Fri Nov 01 00:34:56 UTC 2019<\/code><\/pre><\/div>\n\n\n\nNumeric \u21d4 Date Conversion<\/h2>\n\n\n\n