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fajer
help plz
1 Answer(s)      4 years and 9 months ago
Posted in : Java Interview Questions



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December 18, 2009 at 2:42 PM


Hi Friend,

Try the following codes:

1)//Input only decimal number:
import java.util.*;

class InputDecimalNumber{
public static void main(String[]args){
Scanner input=new Scanner(System.in);
System.out.println("Enter decimal number:");
float num=input.nextFloat();
int number=Math.round(num);
System.out.println("Nearest integer of "+num+" is: "+number);
}
}
//display sum of 5 decimal numnbers:
import java.util.*;

class InputDecimalNumber{
public static void main(String[]args){
Scanner input=new Scanner(System.in);
float sum=0;
System.out.print("Enter score of Exam1: ");
float num1=input.nextFloat();
System.out.print("Enter score of Exam2: ");
float num2=input.nextFloat();
System.out.print("Enter score of Exam3: ");
float num3=input.nextFloat();
System.out.print("Enter score of Project1: ");
float num4=input.nextFloat();
System.out.print("Enter score of Project2: ");
float num5=input.nextFloat();
sum=num1+num2+num3+num4+num5;
int result=Math.round(sum);
System.out.println("Result is: "+result);
}
}
2)//display digit per line:
import java.util.*;
class InputDecimalNumber{
public static void main(String[]args){
Scanner input=new Scanner(System.in);
System.out.println("Enter four digit number:");
int num=input.nextInt();
String number=Integer.toString(num);
String s=number.replace("","\n");
System.out.println(s);
}
}

3)//calculate profit and cost:
import java.util.*;
import java.text.*;
class InputDecimalNumber{
public static void main(String[]args){
DecimalFormat f = new DecimalFormat("$###,###.### ");
Scanner input=new Scanner(System.in);
System.out.println("Enter total amount of milk:");
double totalMilk=input.nextDouble();
//1 milk carton can hold 3.78 liters of milk
double totalmilkCartons=totalMilk/3.78;
long milkCartons=Math.round(totalmilkCartons);
System.out.println("Number of milk cartons to hold "+totalMilk+" liters of milk is: "+milkCartons);
// cost of producing one liter of milk is $0.38
double CPofTotalMilk=totalMilk*0.38;
System.out.println("Cost of total milk is: "+f.format(CPofTotalMilk));
//profit on each carton of milk is $0.27
double totalProfit=milkCartons*0.27;
System.out.println("Total Profit is: "+f.format(totalProfit));
}
}

4)//reverse string:
import java.util.*;
class StringReverse{
public static void main(String[]args){
Scanner input=new Scanner(System.in);
System.out.println("Enter string of 5 characters:");
String st=input.next();
StringBuffer buffer = new StringBuffer(st);
String reverseString=buffer.reverse().toString();
System.out.println("Reversed String: "+reverseString);
}
}

Thanks


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