javac -classpath .:/run_dir/junit-4.12. jar:target/dependency/* -d. Main.java Main.java:53: error: non-static variable this cannot be referenced from a static context RoomCarpet ri1 - new RoomCarpet); //Function to calculate cost of carpet public int getCost() > 40 41 42 //Calls getarea() function to calculate area return rd.getArea()*rate; 43 1 error compiler exit status 1 44 45 46 47 48 49 //Class to test above classes 50 public static void main(String [] args) 51 //Create object of Room Carpet RoomCarpet ri = new RoomCarpet(); 52 53 54 //Set room Dimensions and carpet cost r1.setDimensions(5,4); r1. setRate(8); // Call getCost function to get cost of carpet System.out.println("The carpet will cost : "+r1.getCost()); 55 56 57 58 59 } 60 61 62 63 64 65 66 67 68 //public static void main(String[] args) { //System.out.println("Hello world!"); //} 69 70 71 72

javac -classpath .:/run_dir/junit-4.12. jar:target/dependency/* -d. Main.java Main.java:53: error: non-static variable this cannot be referenced from a static context RoomCarpet ri1 - new RoomCarpet); //Function to calculate cost of carpet public int getCost() > 40 41 42 //Calls getarea() function to calculate area return rd.getArea()*rate; 43 1 error compiler exit status 1 44 45 46 47 48 49 //Class to test above classes 50 public static void main(String [] args) 51 //Create object of Room Carpet RoomCarpet ri = new RoomCarpet(); 52 53 54 //Set room Dimensions and carpet cost r1.setDimensions(5,4); r1. setRate(8); // Call getCost function to get cost of carpet System.out.println("The carpet will cost : "+r1.getCost()); 55 56 57 58 59 } 60 61 62 63 64 65 66 67 68 //public static void main(String[] args) { //System.out.println("Hello world!"); //} 69 70 71 72

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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How to fix

javac -classpath .:/run_dir/junit-4.12. jar:target/dependency/* -d. Main.java
Main.java:53: error: non-static variable this cannot be referenced from a static context
RoomCarpet ri1 - new RoomCarpet);
//Function to calculate cost of carpet
public int getCost()
>
40
41
42
{
//Calls getarea() function to calculate area
return rd.getArea()*rate;
43
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1 error
45
compiler exit status 1
> 0
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//Class to test above classes
public static void main(String [] args)
50
51
//Create object of Room Carpet
RoomCarpet ri = new RoomCarpet();
52
53
54
//Set room Dimensions and carpet cost
r1.setDimensions(5,4);
r1. setRate(8);
// Call getCost function to get cost of carpet
System.out.println("The carpet will cost : "+r1.getCost());
55
56
57
58
59
}
60
61
62
63
64
65
66
67
68
//public static void main(String() args) {
//System.out.println("Hello world!");
//}
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72

1
class Main {
2
3
class RoomDimension
4
{
//Variables for length and width of Room
int length;
int width;
5
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//Set Functions to set values of length and width
public void setLength(int l)
{
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9.
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length = l;
}
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public void setwidth(int w)
{
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width = w;
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}
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//Function To Calculate Area of room
public int getArea()
{
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|return length*width;
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}
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class RoomCarpet
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{
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//A RoomDimension Object and cost variable
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RoomDimension rd = new RoomDimension ();
29
int rate;
30
//Functions to set room Dimensions and cost of carpet
public void setDimensions (int 1, int w)
{
rd. setlength(1);
rd. setWidth(w);
}
31
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35
public void setRate(int r)
{
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rate = r;
39

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