How do i use the printf command with more than one string and arg?

Question

I have written a object that creates a rectangle in java (eclipse), but when i try to print out the information about the rectangle I get a wired error.

This works fine, but is not to pleasant to lock at, since it returns a value with 14 digits after ","

System.out.println("Rectangle2\t Width: " + rectangle2.width + "\tHeight: " + 
            rectangle2.height + "\tArea: " + rectangle2.getArea() + "\tPerimiter: " + rectangle2.getPerimiter());

While this prints it with two digits after " , ", which is what I'm trying to accomplish. But it only prints the first string and number and results in an error.

    System.out.printf("Rectangle2\t Width: %.2f%n", rectangle2.width, "\tHeight: %.2f%n", 
            rectangle2.height + "\tArea: %.2f%n", rectangle2.getArea() + "\tPerimiter: %.2f%n", rectangle2.getPerimiter());

If i only use " , " instead of " + " the error don't come up, but it still only prints the first string and number. How do I print it with %.2f%n without most of it disappearing?

Answer 1

printf的第一个参数是格式String，所有其他参数是格式化String的参数。

System.out.printf("Rectangle2\t Width: %.2f%n\tHeight: %.2f%n\tArea: %.2f%n\tPerimiter: %.2f%n", rectangle2.width,rectangle2.height, rectangle2.getArea(),rectangle2.getPerimiter());