Solved

output format

Posted on 2008-06-26
3
202 Views
Last Modified: 2010-03-30
please help me to display double type output. I know it round off, but i don't know now to fix it. Thanks.
import java.util.*;
import java.io.*;
import java.text.DecimalFormat;
import java.text.NumberFormat;
 
// calculate value of x, y, z
class Calculation
{
	double a, b,  c,  d;
	double t;
 
	public double findPoint ()
	{
		if( a == 0 && b ==0 )       //return z
		{
			t = -d/c;
 
			NumberFormat formatter = new DecimalFormat("##");
			String s = formatter.format(t);
			System.out.print("z is " + s + "\n");
 
			return(t);
		}
		else if( a == 0 && c ==0 )  //return y
		{	t = -d/b;
 
			NumberFormat formatter = new DecimalFormat("##");
			String s = formatter.format(t);
			System.out.print("y is " + s + "\n");
 
			return(t);
		}
		else                        //if( b == 0 && c ==0 )  // return x
		{
			t= -d/a;
 
			NumberFormat formatter = new DecimalFormat("##");
			String s = formatter.format(t);
			System.out.print("x is " + s + "\n");
 
			return(t);
		}
	}
 
	void assignValue (double first, double second, double third, double fourth)
	{
		a = first;
		b = second;
		c = third;
		d = fourth;
	}
}
 
class Demo
{
	public static void main ( String[] args)
	{
 
		double a, b, c, d;
		double x, y, z;
 
		Calculation item1 = new Calculation();
 
		// supposed plane equation is 0.3x + 0.5y + 0.7z + 0.9 = 0
		//                              a      b      c      d
 
		item1.assignValue(0.3,0.0,0.0,0.9); // get x => y = z = 0
		x = item1.findPoint();              //x = -3
 
		item1.assignValue(0.0,0.5,0.0,0.9); // get y => x = z = 0
		y = item1.findPoint();              // y= -1.8
 
		item1.assignValue(0.0,0.0,0.7,0.9); // get z => x = y = 0
		z = item1.findPoint();				// z= -1.2858
 
	}
}

Open in new window

0
Comment
Question by:valleytech
  • 2
3 Comments
 
LVL 86

Accepted Solution

by:
CEHJ earned 500 total points
ID: 21878018
Do you want 2 decimal places? If so:
        public double findPoint2() {
                if ((a == 0) && (b == 0)) //return z
                 {
                        t = -d / c;
 
                        System.out.printf("z is %.2f  n", t);
 
                        return (t);
                } else if ((a == 0) && (c == 0)) //return y
                 {
                        t = -d / b;
                        System.out.printf("y is %.2f  n", t);
 
                        return (t);
                } else //if( b == 0 && c ==0 )  // return x
                 {
                        t = -d / a;
                        System.out.printf("x is %.2f  n", t);
 
                        return (t);
                }
        }

Open in new window

0
 

Author Comment

by:valleytech
ID: 21878058
go it. Thanks for quick response.
0
 
LVL 86

Expert Comment

by:CEHJ
ID: 21878179
:-)
0

Featured Post

Free Tool: ZipGrep

ZipGrep is a utility that can list and search zip (.war, .ear, .jar, etc) archives for text patterns, without the need to extract the archive's contents.

One of a set of tools we're offering as a way to say thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
sql import cannot be resolved jsp 3 45
eclipse console opening separately 2 29
Notify sent to other threads in Java 9 33
learn programming 8 38
Introduction This article is the first of three articles that explain why and how the Experts Exchange QA Team does test automation for our web site. This article explains our test automation goals. Then rationale is given for the tools we use to a…
Introduction This article is the last of three articles that explain why and how the Experts Exchange QA Team does test automation for our web site. This article covers our test design approach and then goes through a simple test case example, how …
Viewers learn about the scanner class in this video and are introduced to receiving user input for their programs. Additionally, objects, conditional statements, and loops are used to help reinforce the concepts. Introduce Scanner class: Importing…
The viewer will learn how to implement Singleton Design Pattern in Java.

856 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question