CODEWITHSUNDEEP
javastring-formatting
User
User

Reputation: 1726

Error printing string formatted with %.0f using an int substitute

I am trying to print the string in toString(). It prints fine if I remove the %.0f and the this.years substitute, but does not print if I include it. I am not sure why. The only reason I can think of is perhaps it is because years is an int, and my string formatting only works with doubles?

How can I change the code so that I can substitute the %.0f with this.years?

// instance members
private double amountBorrowed;
private double yearlyRate;
private int years;
public double A;
public double n = years * 12;

// public instance method
public MyLoan(double amt, double rt, int yrs) {
    this.amountBorrowed = amt;
    this.yearlyRate = rt;
    this.years = yrs;
    this.n = yrs * 12;

public String toString() {

    String temp1 = String.format("Loan: $%.2f at %.2f for %.0f years.", this.amountBorrowed, this.yearlyRate, this.years);
    return temp1;

The error I receive when trying to print is:

Exception in thread "main" java.util.IllegalFormatConversionException: f != java.lang.Integer at java.util.Formatter$FormatSpecifier.failConversion(Formatter.java:4302) at java.util.Formatter$FormatSpecifier.printFloat(Formatter.java:2806) at java.util.Formatter$FormatSpecifier.print(Formatter.java:2753) at java.util.Formatter.format(Formatter.java:2520) at java.util.Formatter.format(Formatter.java:2455) at java.lang.String.format(String.java:2940) at hw2.MyLoan.toString(MyLoan.java:61) at hw2.MyLoan.main(MyLoan.java:101)

Upvotes: 2

Views: 2459

Answers (1)

ashiquzzaman33
ashiquzzaman33

Reputation: 5741

Use '%d' instead of '%.0f' for formating 'int'.

For more about formatting see here http://docs.oracle.com/javase/7/docs/api/java/util/Formatter.html

Upvotes: 2

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