java，作业水果，运用类的静态和重载

package wanzai;

public class Fruit {
private static  Fruit color=null;
private Fruit()
{

}
public static Fruit getcolor(){
if(color==null){
color=new Fruit();

}
return color;
}
public void setcolor()
{
System.out.println();
}
public static void main(String[] args) {
System.out.println("苹果颜色是红色");
Fruit color1=Fruit.getcolor();
color1.setcolor();
System.out.println("香蕉颜色是黄色");
Fruit color2=Fruit.getcolor();
color2.setcolor();

}
}

package wanzai;

public class Fruit1 {
public double price(double price){
return price;
}
public int price(int weigth){
return weigth;
}

public static void main(String[] args)
{
Fruit1 apple=new Fruit1();
System.out.println("苹果的价格是"+apple.price(5.5));
System.out.println("苹果的重量是"+apple.price(10));
Fruit1 banana=new Fruit1();
System.out.println("香蕉的价格是"+banana.price(4.2));
System.out.println("香蕉的重量是"+banana.price(5));
}

}