In this article, we will learn to display a table with columns in the output using Formatter in Java. The table will have headings and show different calculations of an array of floating-point numbers. The first column will display the original number, the second will display the number rounded up, and the third will display the number rounded down. Problem Statement Write a Java program to display a table with columns in the output using Formatter. Input double arr[] = { 1.7, 2.5, 3.1, 4.5, 5.7, 6.9, 7.7, 8.9, 9.1 }; Output The point list... Points1 Points2 Points3 1.70 2.00 1.00 2.50 ... Read More

The minimum field width specifier is what you include between % and the format conversion code.To include a 0 before the field width specifier, pad with 0's. An integer between the % sign and the format conversion code acts as a minimum field width specifier.Let us see an example −Example Live Demoimport java.util.Formatter; public class Demo { public static void main(String args[]) { Formatter f = new Formatter(); System.out.println(f.format("%08d", 697)); f = new Formatter(); System.out.println(f.format("%10d", 9878)); f = new Formatter(); System.out.println(f.format("%06d", 697)); } }Output00000697 9878 000697

Apply the # flag to the %o, %x, %e, and %f format specifiers. If you want to display the hexadecimal number with a 0x prefix, then precede the %x specifier with #.Preceding the %x specifier with a #, the hexadecimal number will be printed with a 0x prefix.Let us see an example wherein $e is used. It includes a decimal point, even if the decimal digits are not present −Example Live Demoimport java.util.Formatter; public class Demo { public static void main(String args[]) { Formatter f = new Formatter(); System.out.println(f.format("%#e", 5F)); } }Output5.000000e+00

For using the Formatter class, import the following package −import java.util.Formatter;We can group specifiers as shown below −Formatter f = new Formatter(); f.format("%,.2f", 38178.9889);The above sets thousands separator and 2 decimal places.The following is an example −Example Live Demoimport java.util.Formatter; public class Demo { public static void main(String args[]) { Formatter f = new Formatter(); f.format("%d", 50); System.out.println(f); f = new Formatter(); f.format("%,.2f", 38178.9889); System.out.println(f); } }Output50 38,178.99

A negative number output can be shown using the Formatter object −Formatter f = new Formatter(); f.format("%12.2f", -7.598); System.out.println(f);Try the below given code to format a Negative Number Output with Parentheses −Formatter f = new Formatter(); f.format("%(d", -50); System.out.println(f);The following is an example −Example Live Demoimport java.util.Formatter; public class Demo { public static void main(String args[]) { Formatter f = new Formatter(); f.format("% d", 50); System.out.println(f); // negative number inside parentheses f = new Formatter(); f.format("%(d", -50); System.out.println(f); } }Output50 (50)

For format specifier, import the following package −import java.util.Formatter;Create a formatter object and set space format specifier −Formatter f = new Formatter(); f.format("% d", -50); System.out.println(f); f = new Formatter(); f.format("% d", 90); System.out.println(f); f = new Formatter(); f.format("%10d", -50); System.out.println(f); f = new Formatter(); f.format("% 10d", 90); System.out.println(f);The following is an example displaying different forms of space format specifiers −Example Live Demoimport java.util.Formatter; public class Demo { public static void main(String args[]) { Formatter f = new Formatter(); f.format("% d", -50); ... Read More

In Java, the left-justifying output means aligning text or data to the left within a specified width, with extra spaces on the right to fill the remaining space. It is commonly used when displaying tabular data or formatting strings. Left justification can be obtained using methods such as String.format() or printf(), which allow you to specify the width of the output field and the alignment of the content. Including a minus sign after the %, makes it left justified. Note − By default, output is right justified To display the Left justify output in Java is quite easy. Let us learn the following methods: ... Read More

To vertically align numeric values in Java, use Formatter. For working with Formatter class, import the following package.import java.util.Formatter;Take an array −double arr[] = { 2.5, 4.8, 5.7, 6.5, 9.4, 8.4, 9.5, 10.2, 11.5 };While displaying this double array values, use the %f to set spaces −for (double d : arr) { f.format("%12.2f %12.2f %12.2f", d, Math.ceil(d), Math.floor(d)); }Above, we have also set the decimal places i.e. 12.2f is for 2 decimal places.The following is an example −Example Live Demoimport java.util.Formatter; public class Demo { public static void main(String[] argv) throws Exception { ... Read More

In this article, we use the '%a' format specifier to represent floating-point numbers in their hexadecimal form. This is useful when you need precise control over the representation of floating-point values. For Formatter, import the following package − import java.util.Formatter; Now creating a 'Formatter'object to format the data− Formatter f = new Formatter(); Using the format() method with the %a format specifier to convert a floating-point number to its hexadecimal string.− f.format("%a", 298.45) Example 1: Basic Example In this example, we format the floating-point number '298.45' to its hexadecimal representation using the '%a' format specifier with a 'Formatter' object ... Read More

Format specifier for Hash Code us %h.Firstly, create a new object for Formatter and Calendar −Formatter f = new Formatter(); Calendar c = Calendar.getInstance();For hash code −f.format("%h", c)The following is an example that finds the hash code −Example Live Demoimport java.util.Calendar; import java.util.Formatter; public class Demo { public static void main(String args[]) { Formatter f = new Formatter(); Calendar c = Calendar.getInstance(); System.out.println("Hash Code: "+f.format("%h", c)); } }OutputHash Code: 4b899958