为什么这个代码一直显示error

package exercise1;

public class Staff {

float screen ;

float cpu;

float mem;

public Staff(float newScreen,float newCpu,float newMem) {

screen = newScreen;

cpu = newCpu;

mem = newMem;

System.out.println("有参的构造方法");

}

}

package exercise1;

public class player {

public static void main(String[]args) {

Staff staff = new Staff();

new Staff(5.0f,1.4b,3.0g);

}

}