JAVA 2019 Old Papers Solution

year 2019

Q.no 11

class BIM
{
public static void main(String args[])
{
int a=0, b=1, c;
System.out.println(a);
System.out.println(b);
for(int i=3;i<=10;i++)
{
c=a+b;
a=b;
b=c;
System.out.println(c);
}
}
}

Q.no 12

String aar[]={"January","February","March","April","May","June","July","August","September","October","November","December"};
for(int i=0; i<aar.length; i++)
{
System.out.println("month"+aar[i]);
try{
Thread.sleep(1000);
}
catch(Exception e)
{
System.out.println(e);
}
}}}
class days implements Runnable
{
public void run()
{
String aa[]={"Sunday","Monday","Tuesday","Wednesday","Thursday","Friday","Saturday"};
for(int i=0; i<aa.length; i++)
{
System.out.println("month"+aa[i]);
try{
Thread.sleep(1500);
}
catch(Exception e)
{
System.out.println(e);
}
}}}
class den
{
public static void main(String args[])
{
month m=new month();
Thread t=new Thread(m);
t.start();
days d=new days();
Thread t1=new Thread(d);
t1.start();
}
}

Q.no 13

class Number
{
int x;
int y;
int z;
Number(inta,intb,int c)
{
x=a;
y=b;
z=c;
}
intgetMax(){
if(x>y&&y>x)
return(x);
else if(y>z)
return(y);
else
return(z);
}
}
classNumberDemo
{
public static void main(String args[])
{
Number n=new Number(3,7,5);
System.out.println("largest number is"+n.getMax());
}
}

 
Q.no 14

class Box
{
int length;
int breadth;
int height;
Box(inta,intb,int c)
{
length=a;
breadth=b;
height=c;
}
voidgetVolume(){
int v=length*breadth*height;
System.out.println("Volume is"+v);
}}
classBoxWeight extends Box{
int weight;
BoxWeight(inta,int b, int c)
{
super(a,b,c);
}
voidsetweight(int w)
{
weight=w;
}
voidgetWeight(){
System.out.println("weight"+weight);
}
void display(){
super.getVolume();
}
}
classBoxDemo
{
public static void main(String args[])
{
BoxWeight n=new BoxWeight(0,0,0);
n.setweight(200);
n.getWeight();
BoxWeightob=new BoxWeight(2,3,4);
ob.display();
}
}

Q.no 15

importjava.util.Scanner;
import java.io.*;
public class JavaProgram
{
public static void main(String[] input)
    {
        String fname;
        Scanner scan = new Scanner(System.in);
        /* enter filename with extension to open and read its content */
System.out.print("Enter File Name to Open (with extension like file.txt) : ");
fname = scan.nextLine();
        /* this will reference only one line at a time */
        String line = null;
try
        {
            /* FileReader reads text files in the default encoding */
FileReaderfileReader = new FileReader(fname);
            /* always wrap the FileReader in BufferedReader */
BufferedReaderbufferedReader = new BufferedReader(fileReader);
while((line = bufferedReader.readLine()) != null)
            {
System.out.println(line);
            }
            /* always close the file after use */
bufferedReader.close();
        }
catch(IOException ex)
        {
System.out.println("Error reading file named '" + fname + "'");
        }
    }
}