Techaispot

public class HelloWorld {
public static void main(String[] args) {
    System.out.println("Hello, World!");
}
}
        

            public class LabTask1
            {
            static boolean val1;
            static double val2;
            static float val3;
            static int val4;
            static long val5;
            static String val6;
            public static void main(String args[])
             {
            System.out.println("Default values....");
            System.out.println("Boolean default is = " + val1);
            System.out.println("Double default is = " + val2);
            System.out.println("Float default is = " + val3);
            System.out.println("Int default is = " + val4);
            System.out.println("Long default is = " + val5);
            System.out.println("String deafult is = " + val6);
             }
            }
        

import java.util.Scanner; 
public class LabTask2
 { 
public static void main(String args[]) 
 { 
Scanner input=new Scanner(System.in); 
System.out.print("Enter value of a:"); 
double a=input.nextDouble(); 
System.out.print("Enter value of b:"); 
double b=input.nextDouble(); 
System.out.print("Enter value of c:"); 
double c=input.nextDouble(); 
double d=b*b-4.0*a*c; 
if (d>0.0) 
 { 
double r1=(-b+Math.pow(d,0.5))/(2.0*a); 
double r2=(-b-Math.pow(d,0.5))/(2.0*a);
System.out.println("THE ROOTS ARE "+r1+" AND "+r2); 
 } 
else if (d==0.0) 
 { 
double r1=-b/(2.0*a);
System.out.println("ROOTS ARE REAL AND EQUAL"); 
System.out.println("The root is "+r1); 
 } 
else
 { 
System.out.println("IMAGINARY ROOTS"); 
 }
 }
} 
        

            class FibSeq
            {
            public static void main(String ar[])
            {
            int n1=0,n2=1,n3,i,count=10;
            System.out.println("fib series:");
            System.out.print(n1+" "+n2);
            for(i=2;i<=count;i++)
            {
            n3=n1+n2;
            System.out.print(" "+n3);
            n1=n2;
            n2=n3;
            }
            }
            }  
        

public class LabTask4
{
public static void main(String args[])
 {
int x=Integer.parseInt(args[0]);
int y=Integer.parseInt(args[1]);
int sum=x+y;
System.out.println("Sum of two numbers is:"+sum);
 }
} 
        

            //LabTask5
//Biggest.java
import java.util.Scanner;
public class Biggest{
private int num1;
private int num2;
public Biggest SetValues()
 {
 Scanner sc= new Scanner(System.in);
System.out.print("Enter 'num1' value: ");
int num1=sc.nextInt();
System.out.print("Enter 'num2' value: ");
int num2=sc.nextInt();
 this.num1=num1;
 this.num2=num2;
return this;
 }
public void display()
 {
    if(num1>num2)
    System.out.print("num1 is bigger");
    else
    System.out.print("num2 is bigger");
     }
    public static void main(String args[])
     {
    Biggest obj = new Biggest();
    obj=obj.SetValues();
    obj.display();
     }
     } 
    
        

            public class LabTask6{
                static String s="HITLER";
                static int x=245;
                static int y;
                static void fun(int z)
                 {
                System.out.println("s: "+s);
                System.out.println("x= "+x);
                System.out.println("y= "+y);
                System.out.println("z= "+z);
                 }
                static
                 {
                System.out.println("static block is invoked");
                 y=x-98;
                 }
                public static void main(String args[])
                 {
                fun(10);
                 }
                } 
                
        

            import java.util.Scanner; 
            public class LabTask7 
            { 
            public static void main(String args[]) 
             { 
            int arr[],n,search,i; 
             Scanner sc=new Scanner(System.in); 
            System.out.println("Enter number of elements: "); 
             n=sc.nextInt(); 
            arr=new int[n];
            System.out.println("Enter "+n+" elements: ");
            for(i=0;i< n;i++) 
            arr[i]=sc.nextInt(); 
            System.out.println("Enter the value to find: "); 
            search=sc.nextInt(); 
            for(i=0;i< n;i++) 
             { 
            if (arr[i]==search)
             { 
            System.out.println(search+" is found at location "+(i+1)); 
            break; 
             } 
             } 
            if(i==n)
            System.out.println(search+" isn't found in array");
             }
            } 
        

 import java.util.Scanner;
public class LabTask8
{ 
public static void binarySearch(int arr[],int first,int last,int 
search)
 { 
int mid=(first+last)/2; 
while(first < =last)
 { 
if(arr[mid]< search )
first=mid+1; 
else if (arr[mid] == search)
 { 
System.out.println( " Element " +search+ " is found at position " +(mid+1)); 
break; 
 }
else
 {
last=mid-1;
 } 
mid=(first+last)/2; 
 } 
if(first>last) 
System.out.println("Element is not found in array");
 } 
public static void main(String args[])
 {
int arr[],n,search,i; 
 Scanner sc=new Scanner(System.in); 
System.out.println("Enter number of elements: "); 
 n=sc.nextInt(); 
arr=new int[n];
System.out.println("Enter "+n+" elements: "); 
for(i=0;i< n;i++) 
arr[i]=sc.nextInt(); 
System.out.println(" Enter the value to find: " ); 
search=sc.nextInt();
int first=0;
int last=n-1; 
binarySearch(arr,first,last,search); 
 } 
} 
        

            import java.util.Scanner;
public class LabTask9
{
public static void main(String args[])
 {
int n,temp;
 Scanner sc=new Scanner(System.in);
System.out.print("Enter array size:");
 n=sc.nextInt();
int a[]=new int[n];
System.out.println("Enter the elements:");
for(int i=0;i< n;i++)
 {
a[i]=sc.nextInt();
 }
for(int i=0;i< n;i++)
 {
for(int j=i+1;j< n;j++)
 {
if(a[i]>a[j])
 {
temp = a[i];
a[i] = a[j];
a[j] = temp;
 }
 }
 }
System.out.print("Sorting The No.s In Ascending Order:");
for(int i=0;i< n;i++)
System.out.print(a[i]+" ");
 }
}

        

            import java.util.Arrays; 
public class LabTask10 
{ 
public static void main(String args[]) 
 { 
 String[] Heroes={"Adolf 
Hitler","JosephStalin","VladimirPutin","Barack 
Obama","ElonMusk","Nicholas Tesla","SatyaNadella"}; 
 //Arrays.sort(Heroes); 
int n=Heroes.length; 
for(int i=0;i< n;i++) 
 { 
for(int j=i+1;j< n;j++) 
 { 
if(Heroes[i].compareTo(Heroes[j])>0) 
 { 
 String temp=Heroes[i]; 
 Heroes[i]=Heroes[j]; 
 Heroes[j]=temp; 
 } 
 } 
 } 
System.out.println(Arrays.toString(Heroes)); 
 } 
} 

        

            import java.util.Scanner;
public class LabTask11
{
public static void main(String args[])
 {
 String str,rev="";
 Scanner sc=new Scanner(System.in);
System.out.println("Enter the string: ");
str=sc.nextLine();
int l=str.length();
for(int i=l-1;i>=0;i--){
rev=rev+str.charAt(i);
 }
if(str.equals(rev))
System.out.println(str+" is a Palindrome");
else
System.out.println(str+" is not a Palindrome");
 }
}

        

            import java.util.Scanner;
public class LabTask12{
public static void main(String args[])
 {
int x,y;
 Scanner sc=new Scanner(System.in);
System.out.println("Enter no.of rows of a matrix: ");
 x=sc.nextInt();
System.out.println("Enter no.of columns of a matrix: ");
 y=sc.nextInt();
int mat1[][]=new int[x][y];
int mat2[][]=new int[x][y];
int sum[][]=new int[x][y];
System.out.println("Enter elements of 1st matrix: ");
for (int i=0;i< x;i++)
 {
for(int j=0;j< y;j++)
mat1[i][j]=sc.nextInt();
 }
System.out.println("Enter elements of 2nd matrix: ");
for(int i=0;i< x;i++)
 {
for(int j=0;j< y;j++)
mat2[i][j]=sc.nextInt();
 }
for(int i=0;i< x;i++)
 {
for(int j=0;j< y;j++)
sum[i][j]=mat1[i][j]
+mat2[i][j];
 }
System.out.println("Addition of matrices: ");
for(int i=0;i< x;i++)
 {
for(int j=0;j< y;j++)
System.out.print(sum[i][j]+"\t");
System.out.println();
System.out.println();
 } 
 } 
} 

        

import java.util.Scanner;
public class LabTask13{
public static void main(String args[])
 {
int n;
 Scanner sc=new Scanner(System.in);
System.out.println("Enter base of matrices: ");
 n=sc.nextInt();
int mat1[][]=new int[n][n];
int mat2[][]=new int[n][n];
int mul[][]=new int[n][n];
System.out.println("Enter elements of 1st matrix: ");
for (int i=0;i< n;i++)
 {
for(int j=0;j< n;j++)
mat1[i][j]=sc.nextInt();
 }
System.out.println("Enter elements of 2nd matrix: ");
for(int i=0;i< n;i++)
 {
for(int j=0;j< n;j++)
mat2[i][j]=sc.nextInt();
 }
for(int i = 0; i < n; i++)
 {
for(int j = 0; j < n; j++)
 {
for(int k = 0; k < n; k++)
mul[i][j]=mul[i][j]+mat1[i][k]*mat2[k][j];
 }
 } 
System.out.println("Multiplication of matrices: ");
for(int i=0;i< n;i++)
 {
for(int j=0;j< n;j++)
System.out.print(mul[i][j]+" ");
System.out.println();
System.out.println();
 }
 }
}
        

            public class LabTask14a
{
public static void main(String[] args)
 {
int a=10;
int b=20;
System.out.println("Values of a and b before the call...");
System.out.println("a="+a+",b="+b);
swap(a,b);
System.out.println("Values of a and b after the call...");
System.out.println("a="+a+",b="+b);
 }
public static void swap(int a,int b)
 {
System.out.println("Inside swap(), before swapping...");
System.out.println("a="+a+",b="+b);
int temp=a;
 a=b;
 b=temp;
System.out.println("Inside swap(), after swapping...");
System.out.println("a="+a+",b="+b);
 }
} 







public class LabTask14b
{
int a,b;
public static void change(LabTask14b obj)
 {
obj.a=20;
obj.b=10;
 }
public static void main(String args[])
 {
 LabTask14b obj=new LabTask14b();
obj.a=10;
obj.b=20;
System.out.println("Before changing...");
System.out.println("a="+obj.a+",b="+obj.b);
change(obj);
System.out.println("After changing...");
System.out.println("a="+obj.a+",b="+obj.b);
 }
} 


        

            class Animal{
                void eat(){System.out.println("eating...");}
                }
                class Dog extends Animal{
                void bark(){System.out.println("barking...");}
                }
                public class LabTask15
                {
                public static void main(String args[])
                 {
                 Dog d=new Dog();
                d.bark();
                d.eat();
                 }
                } 
        

            class Animal{
                void eat(){System.out.println("eating...");}
                }
                class Dog extends Animal{
                void bark(){System.out.println("barking...");}
                }
                class BabyDog extends Dog{
                void weep(){System.out.println("weeping...");}
                }
                public class LabTask16
                { 
                public static void main(String args[])
                 {
                BabyDog d=new BabyDog();
                d.weep();
                d.bark();
                d.eat();
                 }
                } 
        

            //Method Overloading
classMotorBike
{
private String startMethod = "Kick";
public void start()
 {
System.out.println(startMethod+" starting...");
 }
public void start(String method)
 {
this.startMethod = method;
System.out.println(startMethod+" starting...");
 }
}
public class LabTask17a
{
public static void main(String args[])
 {
MotorBike b=new MotorBike();
b.start();
b.start("Self");
 }
} 




//Method Overriding
Class MotorBike
{
public void start()
 {
System.out.println("Using kick paddle to start...");
 }
}
class SelfStartMotorBike extends MotorBike
{
public void start()
 {
System.out.println("Using self start button to start...");
 }
}
public class LabTask17b
{
public static void main(String args[])
 {
SelfStartMotorBike b=new SelfStartMotorBike();
b.start();
 }
} 
        

            //Method Overloading
classMotorBike
{
private String startMethod = "Kick";
public void start()
 {
System.out.println(startMethod+" starting...");
 }
public void start(String method)
 {
this.startMethod = method;
System.out.println(startMethod+" starting...");
 }
}
public class LabTask18a
{
public static void main(String args[])
 {
MotorBike b=new MotorBike();
b.start();
b.start("Self");
 }
}




//Constructor Overloading
class LabTask18b
{
 String lang;
LabTask18b()
 {
this.lang="Java";
 }
LabTask18b(String lang)
 {
this.lang=lang;
 }
public void getLang()
 {
System.out.println("Programming Langauage: "+this.lang);
 }
public static void main(String[] args)
 {
 LabTask18b obj1=new LabTask18b();
 LabTask18b obj2=new LabTask18b("C++");
obj1.getLang();
obj2.getLang();
 }
} 
        

            class Animal{
                public void animalSound() 
                { 
                System.out.println("Animal makes sound"); 
                }
                }
                class Dog extends Animal{
                public void animalSound()
                 {
                super.animalSound();
                System.out.println("Dog says: bow wow");
                 }
                }
                public class LabTask19
                {
                public static void main(String args[])
                 {
                 Dog d=new Dog();
                d.animalSound();
                 }
                } 
        

interface Printable
{
void print();
}
interface Showable
{
void show();
}
class LabTask20 implements Printable, Showable
{
public void print(){System.out.println("Hello");}
public void show(){System.out.println("World");}
public static void main(String args[])
 {
 LabTask20 obj=new LabTask20();
obj.print();
obj.show();
 }
} 
        

public class LabTask21
{
final int x=10;
public static void main(String args[])
 {
 LabTask21 obj=new LabTask21();
obj.x=12;
System.out.println(obj.x);
 }
} 

        

//LabTask22
//A1.java
package pl;
public class A1
{
public void msg(){System.out.println("Hello Incredible");}
}
 //LabTask22
//ex1.java
package mypack5;
import pl.*;
public class ex1
{
public static void main(String args[])
 {
 A1 obj=new A1();
obj.msg();
 }
}
        

//LabTask23
//CircleArea.java
packagemypack;
public class CircleArea{
double a;
public void calcArea(int r){
 a=3.14*r*r;
System.out.println("Area of Circle is: "+a);
 }
}



//LabTask23
//Circle.java
packagepack2;
importmypack.*;
public class Circle{
public static void main(String args[])
 {
CircleArea c=new CircleArea();
 }
} 
        

            abstract class Animal{
                public abstract void animalSound();
                public void eat(){System.out.println("eating...");}
                }
                class Pig extends Animal{
                public void animalSound(){
                System.out.println("The pig says: wee wee");
                 }
                }
                public class LabTask24
                {
                public static void main(String args[])
                 {
                 Pig p=new Pig();
                p.animalSound();
                p.eat();
                 }
                }
                
        

public class LabTask25
{
public static void main(String args[])
 {
try
 {
int x=67/0;
 }
catch(ArithmeticException e1)
 {
System.out.println("Exception 1: "+e1);
 }
try
 {
 String s=null;
System.out.println(s.length());
 }
catch(NullPointerException e2)
 {
System.out.println("Exception 2: "+e2);
 }
 }
} 

        

public class LabTask26
{
public static void main(String args[])
 {
try
 {
int arr[] = new int[-6];
 }
catch(NegativeArraySizeException e)
 {
System.out.println("Generated exception :"+e);
 }
finally
 {
System.out.println("The 'try catch' is finished...");
 }
 }
}
        

//Room.java
import java.io.*;
class Building
{
void color() throws Exception
 {
System.out.println("Blue");
 }
}
class Room extends Building
{
void color() throws Exception
 {
System.out.println("White");
 }
public static void main(String args[])
 {
 Building obj=new Room();
try
 {
obj.color();
 }
catch(Exception e){}
 }
} 

        

            import java.util.Scanner;
class NegativeAmountException extends Exception
{
 String msg;
NegativeAmountException(String msg)
 {
 this.msg=msg;
 }
public String toString()
 {
return msg;
 }
}
public class LabTask28
{
public static void main(String args[])
 {
 Scanner sc=new Scanner(System.in);
System.out.print("Enter the amount: ");
int amt=sc.nextInt();
try
 {
if(amt< 0)
 {
throw new NegativeAmountException(" Invalid Amount...");
 }
else
 {
System.out.println("Amount Deposited...");
 }
 }
catch(NegativeAmountException e)
 {
System.out.println(e);
 }
 }
} 

        

//Derived.java
import java.io.*;
class Base
{
void method() throws Exception
 {
System.out.println("Parent");
 }
}
public class Derived extends Base
{
public static void main(String args[])
 {
 Base obj=new Base();
try
 {
obj.method();
 }
catch(Exception e){}
 }
} 

        

            //ThreadSleep
public class LabTask30 implements Runnable
{
public void run()
 {
for(int i=6;i>=1;i--)
 {
try
 {
Thread.sleep(500);
System.out.println(i);
 }
catch(InterruptedException e)
 {
System.out.println(e);
 }
 }
 }
public static void main(String args[])
 {
 LabTask30 obj1=new LabTask30();
 Thread obj2=new Thread(obj1);
obj2.start();
 }
}

        

           
            
            
            
                
            
            
            
            
Code Example
            
            
            

            <!DOCTYPE html>
            <html> 
            <head> 
                <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.6.9/angular.min.js"></script>
                <script> 
                    var app = angular.module("myapp", []); 
                    app.controller("myctrl", function($scope) { 
                        $scope.s = [
                            { rollno: "1", name: "syed", dept: "it", address: "hyd" },
                            { rollno: "2", name: "mohd", dept: "cse", address: "chennai" },
                            { rollno: "3", name: "uddin", dept: "mech", address: "bangalore" },
                            { rollno: "4", name: "ahmed", dept: "ece", address: "mumbai" },
                            { rollno: "5", name: "ali", dept: "civil", address: "delhi" }
                        ]; 
                    });
                </script> 
            </head> 
            <body ng-app="myapp"> 
                <div ng-controller="myctrl"> 
                    <table border="4"> 
                        <tr> 
                            <th>Roll No</th> 
                            <th>Name</th> 
                            <th>Department</th> 
                            <th>Address</th> 
                        </tr> 
                        <tr ng-repeat="student in s"> 
                            <td>{{student.rollno}}</td> 
                            <td>{{student.name}}</td> 
                            <td>{{student.dept}}</td> 
                            <td>{{student.address}}</td> 
                        </tr> 
                    </table> 
                </div> 
            </body> 
            </html>
            
            
            
            




             
 

 
 
 
 
 
 
rollno
 
name
 
dept
 
address
 
 
 
{{student.rollno}}
 
{{student.name}}
 
{{student.dept}}
 
{{student.address}}