9/20/2023 0 Comments String formatter java exampleWriter.close() The output file ( datetime.txt) would have the following content: Now is 23:25:11 Writer.format("Today is %tD %n", new Date()) Writer.format("Today is %tF %n", new Date()) Writer.format("Now is %tT %n", new Date()) Max value of an int: 2147483647 (7fffffff) Java String Format Example #4:The following code uses the t prefix with date time conversions ( T, F and D) to write formatted Strings of current time and date to a text file: PrintWriter writer = new PrintWriter(new File("datetime.txt")) ("Max value of an int: %d (%1$x)%n", Integer.MAX_VALUE) Note that there are two format specifiers but only one argument so we use the argument index 1$ to specify the argument position for the specifier. ("Min value of an int: %d (%1$x)%n", Integer.MIN_VALUE) ("Max value of a byte: %d (%1$#x)%n", Byte.MAX_VALUE) Java String Format Example #3:The following example prints numbers in both decimal format ( %d) and hexadecimal format ( %x and %#x): ("Min value of a byte: %d (%1$#x)%n", Byte.MIN_VALUE) Java String Format Example #2:The following example uses the flag ‘ -‘ to left-justify the Strings with the width of 30 characters ( %-30s): List listBook = Arrays.asList( It is sold at %.2f USD today.%n", title, price) Note that the %n format specified at the end of the String produces a line terminator specific to the underlying operating system.Output: Effective Java is a great book. Java String Format Example #1:The following code formats a String, an integer number and a float number with the precision of 2 numbers after the decimal point (. Now, let’s see various code examples that demonstrate the usages of format String syntax to format output. The format(Locale locale, String format, Object… args) method formats a String according to the specified locale.The format(String format, Object… args) method formats a String according to the default locale.The printf() method does exactly same as format()method.' (': The result will enclose negative numbers in parentheses.' ': The result will include a leading space for positive values.‘ +’: The result will always include a sign.' -': The result will be left-justified.tD formats a Date object as month/day/year.tF formats a Date object as year-month-day.
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