About the format output control of Java

The SYSTEM.OUT.PRINTLN () feature in Java is powerful and can be used to output any type of data.

Here we do not discuss System.out.println (), but rather discuss System.out.printf ();

About Java in System.out.printf ()

Cases:

System.out.printf ("%d", a); is the integer a output;

System.out.printf ("%4d", a); Is the output of a as a 4-bit integer;

System.out.printf ("%f", a); is the floating-point number a output;

System.out.printf ("%.2f", a); is to retain the floating-point number a two-bit output;

System.out.printf ("%4.2f", a); The floating-point number A is output in 4-bit form, and the decimal fraction is two bits.

About the format output control of Java