浮点型中float型

public class java5_5 {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
float num=3.0f;
System.out.println("num*num="+num*num);
System.out.println(num+"*"+num+"="+num*num);
	}

}