How do i call volume from getVolume into isBigbox method to write an If statement that checks if Box vlomue bigger than or equals to 500?

As you read in the title I am trying to use the volume in getVolume method inside the isBigbox method to check if the volume is smaller than or equals to 500 in which it will print a statement that its big box else it will show it is a small box

public class Box {

    private double length;
    private double width;
    private double height;
    private String color;

    public Box(double length, double width, double height, String color) {
        this.length = length;
        this.width = width;
        this.height = height;
        this.color = color;
    }

    // Overload constructor 1
    public Box() {
        this(1, 1, 1, "without color");
    }

    // Overload constructor 2
    public Box(double length, double width, double height) {
        this(1, 2, 3, "blue");
    }

    // Overload constructor 3
    public Box(double width, double height, String color) {
        this(5, 5, 8, "red");
    }

    // Standard getters and setters omitted for brevity

    public void getVolume(double volume) {
        volume = this.height * this.width * this.height;
        System.out.println("The Volume of the box is:"   volume);
    }
      
    public void isBigBox(Box b) {
        //
    }
}

CodePudding user response：

You call the method getVolume but it does not return anything (void). You should split the methods - than you can call them directly:

public double getVolume() {
    return this.height * this.width * this.length;      
}

public void printVolume() {
    System.out.println("The Volume of the box is:"   this.getVolume());      
}

In isBigBox you can then simple check the volume:

public boolean isBigBox() {
    return this.getVolume() > 500;
}

CodePudding user response：

You will need to make variable called volume in the class Box and make the constructor calculate the volume. you need something like this:

 public class Box {
    
    private double length;
    private double width;
    private double height;
    private String color;

    public Box(double length, double width, double height,String color){
        this.length=length;
        this.width=width;
        this.height=height;
        this.color=color;
    }
  
    // 
    public double getVolume() {
        return hight*width*length;
    }
    // 
    public boolean isBigBox(){
        return (getVolume() >= 500); 
    }
}