printfdemo.java

java编程代码

public class PrintfDemo
{
    public static void main(String[] args)
    {
        String aString = "abc";

        System.out.println("String output:");
        System.out.println("START1234567890");
        System.out.printf("START%sEND %n", aString);
        System.out.printf("START%4sEND %n", aString);
        System.out.printf("START%2sEND %n", aString);
        System.out.println( );

        char oneChracter = 'Z';

        System.out.println("Character output:");
        System.out.println("START1234567890");
        System.out.printf("START%cEND %n", oneChracter);
        System.out.printf("START%4cEND %n", oneChracter);
        System.out.println( );

        double d = 12345.123456789;

        System.out.println("Floating-point output:");
        System.out.println("START1234567890");
        System.out.printf("START%fEND %n", d);
        System.out.printf("START%.4fEND %n", d);
        System.out.printf("START%.2fEND %n", d);
        System.out.printf("START%12.4fEND %n", d);
        System.out.printf("START%eEND %n", d);
        System.out.printf("START%12.5eEND %n", d);
    }
}