![]() If the input is less than the width ,the output is padded by spaces by default. This specifies the minimum number of characters to appear in the output. + - to indicate + for positive numbers and – for negative numbers. ![]() , - to comma separate numbers greater than 1000. Used to specify alignment behavior (- for left alignment,if not specified it defaults to right alignment). First portion of format specifiersĪrgument_index= an optional integer value denoting the position of the argument to be fed into this position from the arguments list.First argument is denoted by 1$,second argument by 2$ and so on.The argument_index can be swapped to determine where the passed arguments will be placed in the final string.One argument can be passed in and be used in multiple format specifiers in the template.e.g in formatting involving date/time as demonstrated in Example 4.įlags-They are optional. They are the building blocks of how we format our arguments to make the output string dynamic as per the passed arguments. The second argument is a variable-arity array of arguments that are fed at the respective positions as defined in our format specifiers. The first parameter ,format of type String is a string template containing format specifiers along side other static text. The printf method in Java was introduced after heavily borrowing from C’s printf method. args) exists that allows formatting of Strings.PrintStream is one of the classes in the java.io package that can be used to write data in a readable form.It can also be used to add functionality to another output stream as the Stream classes extensively use the Decorator design pattern. In addition to the above methods,a similar method PrintStream printf(String format, Object. ![]() The above methods throw when an argument that does not match the format specifier’s conversion is passed in. Public static String format(Locale l, String format, Object. Public static String format(String format, Object. The Java String format() method is used to specify a template by which we can format a string before storage to a database ,printing to the console or before feeding it as input to a web service, socket call ,API call or before displaying it to the user in a mobile screen or on a webpage.
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