Exception in thread "main" java.util.illegalformatconversionexception: d ! = java.lang.string

Question

1.00/5 (1 vote)

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Exception in thread "main" java.util.IllegalFormatConversionException: d != java.lang.String
    at java.util.Formatter$FormatSpecifier.failConversion(Formatter.java:4302)
    at java.util.Formatter$FormatSpecifier.printInteger(Formatter.java:2793)
    at java.util.Formatter$FormatSpecifier.print(Formatter.java:2747)
    at java.util.Formatter.format(Formatter.java:2520)
    at java.io.PrintStream.format(PrintStream.java:970)
    at java.io.PrintStream.printf(PrintStream.java:871)
    at practical3.main(practical3.java:34)

What I have tried:

/**
 * @(#)P3Q1S.java
 *
 *
 * @author 
 * @version 1.00 2020/7/3
 */

import java.util.Scanner;

public class practical3 {

    public static void main (String[] args) {
    	
    	Scanner scanner = new Scanner(System.in);
    	
    	int[] Denomination = {100,50,20,10,5,1};
    	int[] Quantity = new int [Denomination.length];

		System.out.printf("\n\n%20s %20s\n","Denomination	(RM)","Quantity");
		for (int i=0;i<Denomination.length;i++)
			{
				
			System.out.printf("\n %20s\t\t\t\t\t",Denomination[i]);
			Quantity[i]=scanner.nextInt();
		}
		
		int subtotal=0,total=0;
		System.out.printf("\n\n%20s %20s %20s\n","Denomination	(RM)","Quantity","Value	(RM)");
		for (int i=0;i<Denomination.length;i++ )
			{
				
			subtotal= Denomination[i] * Quantity[i];
			System.out.printf("\n\n%20d %20d %20d\n","Denomination[i]","qty[i]","subtotal");
			total+=subtotal;
		}
		
		System.out.println("Grand total(RM)=" +total);
    }
    
    
}

Posted 20-Aug-20 1:37am

Member 14918856

Updated 20-Aug-20 1:59am

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Member 14918856 20-Aug-20 10:55am

thanks a lot i have solve the problem

2 solutions

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Richard MacCutchan · Answer 1 · 2020-08-20T01:59:00

Solution 1

You are passing strings to the print formatter where your format string requires integers:

Java

System.out.printf("\n\n%20d %20d %20d\n","Denomination[i]","qty[i]","subtotal");

// the above sholud be:
System.out.printf("\n\n%20d %20d %20d\n", Denomination[i], qty[i], subtotal); // remove quotes from the variable names. Also, what is "qty", you do not have a variable by that name.

Posted 20-Aug-20 1:59am

Richard MacCutchan

Comments

Member 14918856 20-Aug-20 10:52am

import java.util.Scanner;

public class P3Q1S {

public static void main (String[] args) {

Scanner scanner = new Scanner(System.in);

int[] Denomination = {100,50,20,10,5,1};
int[] Quantity = new int [Denomination.length];

System.out.printf("\n\n%20s %20s\n","Denomination (RM)","Quantity");
for (int i=0;i

Member 14918856 20-Aug-20 10:55am

thanks a lot i have solve the problem

Garth J Lancaster · Answer 2 · 2020-08-20T02:00:00

Solution 2

Why the quotes around Denomination[i] and qty[i] and subtotal in this

System.out.printf("\n\n%20d %20d %20d\n","Denomination[i]","qty[i]","subtotal");

Shouldn't it be

System.out.printf("\n\n%20d %20d %20d\n",Denomination[i],qty[i],subtotal);

??

Posted 20-Aug-20 2:00am

Garth J Lancaster

Comments

Member 14918856 20-Aug-20 10:51am

same error occur when after i update the code

Member 14918856 20-Aug-20 10:55am

thanks a lot i have solve the problem