Java Programming Assignments with Solutions

This page contains solved assignments for Java programming with solutions. The assignments cover topics like time conversion, Roman numeral conversion, and more. The code is written in Java programming language and is suitable for beginners and intermediate learners. The assignments include step-by-step solutions and are perfect for improving your programming skills.

Java programming
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Java programming
Question 1
package a2q1;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Scanner;
public class A2Q1 {
public static void main(String[] args) {
Scanner n= new Scanner(System.in);
System.out.print("Enter the time format:");
int a=n.nextInt();
if(a==24){
System.out.print("Enter time:");
Scanner nu= new Scanner(System.in);
String inputi=nu.nextLine();
A2Q1 t= new A2Q1();
t.conv24(inputi);
}else
if(a==12){

Java programming
System.out.print("Enter time:");
Scanner nu= new Scanner(System.in);
String inputi=nu.nextLine();
A2Q1 t= new A2Q1();
t.conv12(inputi);
}else{
System.out.print("Wrong entry");
}
}
public void conv12( String inputi){
DateFormat ft= new SimpleDateFormat("HH:mm");
DateFormat outputformat = new SimpleDateFormat("hh:mm aa");
Date da = null;
String output=null;
try{
da= ft.parse(inputi);
output = outputformat.format(da);
System.out.println(inputi+" to 12hrs clock system is" +output);
}catch(ParseException pe){
pe.printStackTrace();
}

Java programming
}
public void conv24(String inputi){
DateFormat ft= new SimpleDateFormat("hh:mm aa");
DateFormat outputformat = new SimpleDateFormat("HH:mm");
Date da = null;
String output=null;
try{
da= ft.parse(inputi);
output = outputformat.format(da);
System.out.println(output);
}catch(ParseException pe){
pe.printStackTrace();
}
}
}

Java programming
Question 2
package a2q2;
import java.util.Scanner;
public class A2Q2 {
static String romanNumeral;
static int decimalNum;
public static void main(String[] args) {
A2Q2 rmtoD = new A2Q2();
rmtoD .convertToDecimal();
rmtoD .printRoman(romanNumeral);
}
public void convertToDecimal () {
Scanner scan = new Scanner(System.in);
System.out.print("Enter a Roman number: ");
romanNumeral = scan.nextLine();
romanNumeral = romanNumeral.toUpperCase();
int l= romanNumeral.length();
int num=0;
int previousnum = 0;
for (int i=l-1;i>=0;i--)
{
char x = romanNumeral.charAt(i);
x = Character.toUpperCase(x);

Java programming
switch(x)
{
case 'I':
previousnum = num;
num = 1;
break;
case 'V':
previousnum = num;
num = 5;
break;
case 'X':
previousnum = num;
num = 10;
break;
case 'L':
previousnum = num;
num = 50;
break;
case 'C':
previousnum = num;
num = 100;
break;
case 'D':
previousnum = num;
num = 500;
break;
case 'M':
previousnum = num;
num = 1000;

Java programming
break;
}
if (num<previousnum)
{decimalNum= decimalNum-num;}
else
decimalNum= decimalNum+num;
}
}
public static void printRoman (String romanNumeral){
System.out.println ("The equivalent of the Roman numeral "+romanNumeral+" is
"+decimalNum);
}
public static void printDecimal (int decimalNum){
System.out.println ("Decimal Number stored is: " + decimalNum);
}
}

Java programming
Question 3
package a2q3;
import java.util.Scanner;
public class A2Q3 {
public static void main(String[] args) {
int i;
System.out.println("Enter n:");
Scanner h = new Scanner(System.in);
int hi=h.nextInt();
System.out.println("Enter rock distsnce");
int []git=new int[hi];
for(i=0;i<hi;i++){
Scanner j = new Scanner(System.in);
git[i]=j.nextInt();
}
System.out.println("Enter m");
Scanner p = new Scanner(System.in);
int po=p.nextInt();
int []jj=new int[po];
String [] name=new String [po];
for(int y=0;y< po;y++){

Java programming
Scanner j = new Scanner(System.in);
System.out.println("Enter name");
name[y]=j.nextLine();
System.out.println("Enter step");
jj[y]=p.nextInt();
}
int u;
for(u=0;u< hi;u++){
for(int t=0;t<po;t++){
if(jj[t]> git[u]){
System.out.print(name[t]+":"+jj[t] +"\n2");
}
}
}
System.out.print("The above crossed the river \n");
}
}