Solved

# output format

Posted on 2008-06-26
200 Views
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

}
}
``````
0
Question by:valleytech
• 2

LVL 86

Accepted Solution

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);
}
}
``````
0

Author Comment

ID: 21878058
go it. Thanks for quick response.
0

LVL 86

Expert Comment

ID: 21878179
:-)
0

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