How do I introduce a float value in this Java code? [closed]

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import java.io.*;

public class CheckbookBalancingCalculator {
    public static void main( String[] args ) throws IOException {
        String statementbalance, depositstotal, checkstotal, feestotal;
        int statement, deposits, checks, fees, index;
        BufferedReader dataIn = new BufferedReader( new InputStreamReader( System.in ));

        System.out.println( "\tBalancing Your Checkbook:" );
        System.out.println();
        System.out.print( "\t\tWhat is the balance from your last statement?" );
        statementbalance = dataIn.readLine();
        statement = Integer.parseInt( statementbalance );
        System.out.print( "\t\tWhat is the to开发者_运维问答tal amount of all deposits?" );
        depositstotal = dataIn.readLine();
        deposits = Integer.parseInt( depositstotal );
        System.out.print( "\t\tWhat is the total amount of all checks?" );
        checkstotal = dataIn.readLine();
        checks = Integer.parseInt( checkstotal );
        System.out.print( "\t\tWhat is the total amount of all transaction fees?" );
        feestotal = dataIn.readLine();
        fees = Integer.parseInt( feestotal );

        index = statement + deposits - checks - fees;

        System.out.println();
        System.out.println( "\tYour new balance is " + Math.round( index ) + "." );
        System.out.println();
    }
}

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Floats/Doubles are a bad idea. US Currency is a fixed decimal calculation.

String statementBalanceInput, depositsTotalInput, checksTotalInput, feesTotalInput;
int statement, deposits, checks, fees, index;

BigDecimal statementBalance = new BigDecimal( statementBalanceInput);
BigDecimal depositsTotal = new BigDecimal( depositsTotalInput);
BigDecimal checksTotal = new BigDecimal( checksTotalInput);
BigDecimal feesTotal = new BigDecimal( feesTotalInput);

This is off the top of my head. Then do the math with BigDecimal.

---

import java.io.*;

public class CheckbookBalancingCalculator {
    public static void main( String[] args ) throws IOException {
        String statementbalance, depositstotal, checkstotal, feestotal;
        float statement, deposits, checks, fees, index;
        BufferedReader dataIn = new BufferedReader( new InputStreamReader( System.in ));

        System.out.println( "\tBalancing Your Checkbook:" );
        System.out.println();
        System.out.print( "\t\tWhat is the balance from your last statement?" );
        statementbalance = dataIn.readLine();
        statement = Float.parseFloat( statementbalance );
        System.out.print( "\t\tWhat is the total amount of all deposits?" );
        depositstotal = dataIn.readLine();
        deposits = Float.parseFloat( depositstotal );
        System.out.print( "\t\tWhat is the total amount of all checks?" );
        checkstotal = dataIn.readLine();
        checks = Float.parseFloat( checkstotal );
        System.out.print( "\t\tWhat is the total amount of all transaction fees?" );
        feestotal = dataIn.readLine();
        fees = Float.parseFloat( feestotal );

        index = statement + deposits - checks - fees;

        System.out.println();
        System.out.println( "\tYour new balance is " + Math.round( index ) + "." );
        System.out.println();
    }
}

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The answer you are probably looking for is Float.parseFloat() or Double.parseDouble(), depending on required precision.

If you happen to accept currency / numeric values in different formats, depending on locale, try NumberFormat methods instead (passing valid Locale object).