Using Math Pow in Java

public class abejeroact53 {
public static void main(String []Args) {

System.out.println(Math.pow(3,3));

}}

Library Math Operations in Java

public class abejeroact52 {
public static void main(String []Args) {

System.out.println(Math.toDegrees(Math.PI/2));
System.out.println(Math.toRadians(30));
System.out.println(Math.sin(0));
System.out.println(Math.sin(Math.toRadians(270)));
System.out.println(Math.sin(Math.PI/6));
System.out.println(Math.sin(Math.PI/2));
System.out.println(Math.cos(0));
System.out.println(Math.cos(Math.PI/6));
System.out.println(Math.cos(Math.PI/2));
System.out.println(Math.acos(0.5));

}}

Matching Strings in Java

public class abejeroact51 {
public static void main(String []Args) {

String string1 = "Hello";
String string2 = "hello";

if(string1.compareTo(string2)==0)
{
System.out.println("Match");
}
else
{
System.out.println("No Match");
}

}}

Searching Specific Words in Java

public class abejeroact50 {
public static void main(String []Args) {

String searchMe = "Green Eggs and Ham";
String findMe = "and";

int searchMelength = searchMe.length();
int findMelength = findMe.length();
boolean foundIt = false;

for (int i = 0; i <= (searchMelength-findMelength); i++)
{
if(searchMe.regionMatches (i, findMe, 0, findMelength))
{
foundIt = true;
System.out.println(searchMe.substring(i, i+findMelength));
break;
}
}
if (!foundIt)
{
System.out.println("No Match Found");
}
}
}

Using Comments in Java

import java.util.Scanner;
public class abejeroact49 {
Scanner input = new Scanner(System.in);

//method ready to insert (if theres any method for this source file.

public static void main(String Args[]) {



}
}

To Upper and Lower Case in Java

import java.lang.String;
public class abejeroact48 {
public static void main(String []Args) {

String name = "sam";
String name2 = "ANA";

String b = name2.toLowerCase();
String b2 = name.toUpperCase();

System.out.println("Lower Case\t" +b);
System.out.println("Upper Case\t" +b2);

}
}

Getting the Index of, and Reading Length In Java

public class abejeroact47 {
public static void main(String []Args) {

Double d = 858.43;
String s = Double.toString(d);

int dot = s.indexOf('.');

System.out.println((s.length()-dot-1) + "\t digit after decimal point");

}
}

Using Double and %s %2f in Java

public class abejeroact46 {
public static void main(String []Args) {

Double grade1 = 85.0;
Double grade2 = 79.0;
Double grade3 = 92.0;

Double sum = (grade1+grade2+grade3);

Double i = sum/3;
String name = "ana";

System.out.printf("%s Average is Double %2f", name, i);
}
}

Palindrome 3 in Java

public class abejeroact44 {
public static void main(String[] args) {

String palindrome = "Dot saw I was toD";

char len = palindrome.charAt(5);

System.out.println("The length of string is\t" +len);

}}

Palindrome 2 in Java

import java.util.Scanner;

public class abejeroact43 {
public static void main(String[] args) {

Scanner input=new Scanner(System.in);
String palindrome;

System.out.println("Enter a String");
palindrome = input.next();
int len = palindrome.length();

System.out.println("The length of string is\t" +len);

}}

Palindrome in Java

public class abejeroact42 {
public static void main(String[] args) {

String palindrome = "Dot saw I was toD";
int len = palindrome.length();

System.out.println("The length of string is\t" +len);

}}

Calculating the Area (Using Classes) in Java

import java.util.Scanner;
public class abejeroact36 {

public static int area(int l1, int w1)
{
return l1*w1;
}

public static void main(String abcd[]) {
Scanner in = new Scanner(System.in);
int w,l;

System.out.println("Length");
l=in.nextInt();
System.out.println("Width");
w=in.nextInt();
System.out.println("Area\t" +area(l,w));

}
}

Reversing Array in Java

import java.util.Scanner;
public class abejeroact35 {
public static void main(String abcd[]) {
Scanner in = new Scanner(System.in);
int n;
int []array;
int r=0;

System.out.println("How many numbers");
n = in.nextInt();
array = new int[n];

while (r<n) {
System.out.print("Enter Number :\t");
array[r]=in.nextInt();
r++;
}
System.out.println("");
System.out.println("\tReverse");
for (r=n-1;r>=0; r--)
{
System.out.println("\t\t" +array[r]);
}

}
}

Select Case in Java

import java.util.Scanner;
public class abejeroact34 {
public static void main (String[] args) {
Scanner input = new Scanner(System.in);
System.out.println("\tMenu\n 1. Calculator\n 2. Conversion\n 3. Exit");
int choice = input.nextInt();
String alpha;
char alphabet;
String alphaa;
char alphabets;

switch (choice)
{
case 1:
{
System.out.println("\tCalculator Menu\n S. Sum\n D. Difference\n P. Product\n A. Average");
do {
System.out.println("Enter Choice");
alpha = input.next();
alphabet = alpha.charAt(0);
}
while ((((alphabet!='S') && (alphabet!='D') && (alphabet!='P') && (alphabet!='A'))));

switch (alphabet)
{
case 'S':
{
System.out.println("Sum");
}
break;
case 'D':
{
System.out.println("Difference");
}
break;
case 'P':
{
System.out.println("Product");
}
break;
case 'A':
{
System.out.println("Average");
}
break;
}
}
break;
case 2:
{
System.out.println("\tBinary Menu\n B. Binary\n D. Decimal\n H. Hex\n O. Octal");
do {
System.out.println("Enter Choice");
alphaa = input.next();
alphabets = alphaa.charAt(0);
}
while ((((alphabets!='B') && (alphabets!='D') && (alphabets!='H') && (alphabets!='O'))));

switch (alphabets)
{
case 'B':
{
System.out.println("Binary");
}
break;
case 'D':
{
System.out.println("Decimal");
}
break;
case 'H':
{
System.out.println("Hex");
}
break;
case 'O':
{
System.out.println("Octal");
}
break;
}
}
break;
case 3:
{
System.out.println("Thanks for using my Program");
break;
}
}
}
}

Switch Statement in Java

import java.util.Scanner;
public class abejeroact33 {
public static void main (String[] args) {
Scanner input = new Scanner(System.in);
System.out.println("\tMenu\n 1. Calculator\n 2. Conversion\n 3. Exit");
int choice = input.nextInt();
String alpha;
char alphabet;

switch (choice)
{
case 1:
{
System.out.println("\tCalculator Menu\n S. Sum\n D. Difference\n P. Product\n A. Average");
do {
System.out.println("Enter Choice");
alpha = input.next();
alphabet = alpha.charAt(0);
}
while ((((alphabet!='S') && (alphabet!='D') && (alphabet!='P') && (alphabet!='A'))));

switch (alphabet)
{
case 'S':
{
System.out.println("Sum");
}
break;
case 'D':
{
System.out.println("Difference");
}
break;
case 'P':
{
System.out.println("Product");
}
break;
case 'A':
{
System.out.println("Average");
}
break;
}
break;
}
case 2:
{
System.out.println("\tBinary Menu\n B. Binary\n D. Decimal\n H. Hex\n O. Octa");
break;
}
case 3:
{
System.out.println("Thanks for using my Program");
break;
}
}
}
}

Showing Odd and Even Numbers using For Loop, If Else-If and Arrays in Java

import java.util.Scanner;
public class abejeroact30 {
public static void main (String[] arg) {
Scanner input = new Scanner(System.in);

int nos;
System.out.println("Enter how many number");
nos = input.nextInt();
int[]array;
array = new int[nos];
int even;
int odd;

for (int x = 1;x<=nos;x++)
{
System.out.println("Number " +x);
array[x] = input.nextInt();
}
if (array[x]%2!=0)
{
odd = array[x];
}
else if (array[x]%2==0)
{
even = array[x];
}
System.out.println("The odd numbers are\t" +odd);
System.out.println("The odd numbers are\t" +even);
}
}

Using For Loop - Arrays in Java

import java.util.Scanner;
public class abejeroact29 {
public static void main (String[] arg) {
Scanner input = new Scanner(System.in);

int nos;
System.out.println("Enter how many number");
nos = input.nextInt();
int[]no;
no = new int[nos];

for (int x = 1;x<=nos;x++)
{
System.out.println("Number " +x);
no[x] = input.nextInt();
}
}
}

Using Arrays in Java

import java.util.Scanner;
public class abejeroact26 {
public static void main (String[] arg) {
Scanner input = new Scanner(System.in);

int []a;
a = new int[10];
int b;
for (b=0;b<10;b++){
System.out.println("No. " +b);
a[b] = input.nextInt();}
for(b=0; b<10;b++){
System.out.println("The number are =\t" +a[b]);
}
}
}

Complicated If - && Statement in Java

import java.util.Scanner;
public class abejeroact25 {
public static void main (String[] arg) {
Scanner abejeroact25 = new Scanner(System.in);

int grade1;
int grade2;
int grade3;
int grade4;
int grade5;
int sum;
System.out.println("Enter the value for Grade1");
grade1 = abejeroact25.nextInt();
System.out.println("Enter the value for Grade2");
grade2 = abejeroact25.nextInt();
System.out.println("Enter the value for Grade3");
grade3 = abejeroact25.nextInt();
System.out.println("Enter the value for Grade4");
grade4 = abejeroact25.nextInt();
System.out.println("Enter the value for Grade5");
grade5 = abejeroact25.nextInt();
sum = grade1+grade2+grade3+grade4+grade5;
int ave;
ave = sum/5;
System.out.println("Average of the Student\t" +(ave));

if (ave<75)
{
System.out.println("Failed");
}
if ((ave>=75) && (ave<=85))
{
System.out.println("Satisfactory");
}
if ((ave>=85) && (ave<=90))
{
System.out.println("Very Satisfactory");
}
if ((ave>=90) && (ave<=100))
{
System.out.println("Outstanding");
}
if (ave>100)
{
System.out.println("Invalid Input");
}

}
}

Using && Statement in Java

public class abejeroact24 {
public static void main (String args[]){
int a = 95;
if ((a>=75) && (a<=95))
{
System.out.println("Passed");
}
else
{
System.out.println("Failed");
}
}
}

Using Break in Java

public class abejeroact23 {
public static void main (String args[]){
for (int a=0; a<=10;a++)
{
System.out.println(a);
if (a==5)
break;
}

}
}

Using Case Statement in Java

import java.util.Scanner;
public class abejeroact22 {
public static void main(String[] jda) {
Scanner input = new Scanner(System.in);
int choice;
System.out.println("MENU\n 1. Lower Case\n 2. Upper Case\n 3. Exit");
do

{
System.out.println("Enter Your choice");
choice = input.nextInt();
continue;
}
while(choice!=1 && choice!=2 && choice!=3);
switch (choice)
{
case 1:
{
System.out.println("a b c d e f g h i j k l m n o p q r s t u v w x y z");
}
break;
case 2:
{
System.out.println("A B C D E F G H I J K L M N O P Q R S T U V W X Y Z");
}
break;
case 3:
{
System.out.println("Exit");
}
break;
}
}
}

Using Do While in Java

public class abejeroact21 {
public static void main(String[] jda) {
int x = 0;

do

{
System.out.println(x);
x=x+1;
}
while(x<=10);
}
}

Using For Loop and If Statement (Showing Odd Number) in Java

public class abejeroact20 {
public static void main(String[] jda) {
for(int x=1;x<=100;x++)
{
if (x%2!=0)
{
System.out.println(x);
}
}
}
}

Using For Loop and If Statement (Showing Even Number) in Java

public class abejeroact19 {
public static void main(String[] jda) {
for(int x=1;x<=100;x++)
{
if (x%2==0)
{
System.out.println(x);
}
}
}
}

Using For Loop while using Mathematical Operations in Java

public class abejeroact18 {
public static void main(String[] jda) {
int a;
int b = 0;
for (a=1;a<=50;a++)
{
System.out.println(a);
b=b+a;
}
System.out.println("The Number on the Right is the Sum\n" +"of the First 50 Natural Numbers\t" +b);
}
}

Using While Loops in Java

public class abejeroact17 {
public static void main(String[] jda) {
int x=1;
while (x<=9)
{
x++;
{
System.out.println(x);
}
}
}
}

Using For Loop 2 in Java

public class abejeroact16 {
public static void main(String[] jda) {
for(int x=10;x>=1;x--)
{
System.out.println(x);
}

}
}

Using For Loop in Java

public class abejeroact15 {
public static void main(String[] jda) {
for(int x=1;x<=10;x++)
{
System.out.println(x);
}

}
}

Choosing Between Sum, Difference, Product and Average in Java

import java.util.Scanner;
public class abejeroact14 {
public static void main(String[] jda) {
Scanner input = new Scanner(System.in);
int a;
int b;
int c;
System.out.println("Enter the First Value");
a = input.nextInt();
System.out.println("Enter the Second Value");
b = input.nextInt();
System.out.println("Enter the Third Value");
c = input.nextInt();
int sum = a + b + c;
int diff = a - b - c;
int prod = a * b * c;
int ave = (a + b + c) / 3;
int choice;
System.out.println("Enter Your Choice Below\n 1. Sum\n 2. Difference\n 3. Product\n 4. Average");
choice = input.nextInt();
switch (choice)
{
case 1:
{
System.out.println("Sum\t" +sum);
}
break;
case 2:
{
System.out.println("Difference\t" +diff);
}
break;
case 3:
{
System.out.println("Product\t" +prod);
}
break;
case 4:
{
System.out.println("Average\t" +ave);
}
break;
default:
{
System.out.print("Error Code");
}
}
}
}

If If Else, Conditional Statement in Java

import java.util.Scanner;
public class abejeroact13 {
public static void main (String[] args) {
Scanner input = new Scanner(System.in);
int a;
System.out.println("Enter Choice between nos. 1 and 2");
a = input.nextInt();
if (a==1)
{
System.out.println("Hi!\n You pressed 1");
}
if (a==2)
{
System.out.println("Hello\n You pressed 2");
}
if (a>2)
{
System.out.println("Good Morning\n You input nos. other than 1 and 2");
}
else if (a<1)
{
System.out.println("Good Morning\n You input nos. other than 1 and 2");
}

}
}

Using Conditional Statement through Complicated Problem in Java

import java.util.Scanner;
public class abejeroact12 {
public static void main (String[] args) {
Scanner input = new Scanner(System.in);
int a;
System.out.println("Enter Choice between nos. 1 and 2");
a = input.nextInt();
if (a==1)
{
System.out.println("Hi!\n You pressed 1");
}
if (a==2)
{
System.out.println("Hello\n You pressed 2");
}
if (a>2)
{
System.out.println("Good Morning\n You input nos. other than 1 and 2");
}
else if (a<1)
{
System.out.println("Good Morning\n You input nos. other than 1 and 2");
}

}
}

Using Double in Java

import java.util.Scanner;
public class abejeroact11 {
public static void main (String[] args) {
Scanner input = new Scanner(System.in);
String name;
int p;
int ppy;
int noy;
double ir;
System.out.println("Enter the name of Loan");
name = input.next(); //accept string
System.out.println("Enter the value for Principal");
p = input.nextInt();
System.out.println("How many times you're going to pay per year?");
ppy = input.nextInt();
System.out.println("How many years you're going to pay for that?");
noy = input.nextInt();
System.out.println("What is the Interest Rate?");
ir = input.nextDouble();
double ps = ir * (p / ppy) /1 - ((ir / ppy) + 1) * ppy * noy;
System.out.println(name+ "\tLoan");
System.out.println("Pay Per Year\n" +ppy);
System.out.println("Number of Years\n" +noy);
System.out.println("Interest Rate\n" +ir);
System.out.println("Payments\n" +ps);
}
}

Using If Else - If Statement (Conditional Statement) in Java

import java.util.Scanner;
public class abejeroact10 {
public static void main (String[] args) {
Scanner input = new Scanner(System.in);
int day;
System.out.println("Enter your choice\n 1 = Sunday\n 2 = Monday\n 3 = Tuesday\n 4 = Wednesday\n 5 = Thursday\n 6 = Friday\n 7 = Saturday");
day = input.nextInt();
if (day>7)
{
//true statements (day>7);
System.out.println("Invalid Input");
}
else if (day<1)
{
//false statements (day<1);
System.out.println("Invalid Input");
}
if (day==1)
{
//true statements (day==1);
System.out.println("Sunday");
}
if (day==2)
{
//true statements (day==2);
System.out.println("Monday");
}
if (day==3)
{
//true statements (day==3);
System.out.println("Tuesday");
}
if (day==4)
{
//true statements (day==4);
System.out.println("Wednesday");
}
if (day==5)
{
//true statements (day==5);
System.out.println("Thursday");
}
if (day==6)
{
//true statements (day==6);
System.out.println("Friday");
}
if (day==7)
{
//true statements (day==7);
System.out.println("Saturday");
}

}
}

Asking User to Input, while using Conditional Statement in Java

import java.util.Scanner;
public class abejeroact9 {
public static void main (String[] args) {
Scanner abejeroact9 = new Scanner(System.in);
int a;
int b;
System.out.println("Enter value for A");
a = abejeroact9.nextInt();
System.out.println("Enter value for B");
b = abejeroact9.nextInt();
if (a>b)
{
//true statement
System.out.println("A is bigger than B");
}
else
{
System.out.println("B is bigger than A");
}
}
}

Using Conditional Statement in Java

public class abejeroact8 {
public static void main (String[] args) {
int a = 10;
int b = 5;
if (a>b)
{
//true statement
System.out.println("A is bigger than B");
}
else
{
System.out.println("B is bigger than A");
}
}
}

Asking User to Input Grades then Show the Result in Java

import java.util.Scanner;
public class abejeroact6 {
public static void main (String[] arg) {
Scanner abejeroact6 = new Scanner(System.in);
int grade1;
int grade2;
int grade3;
int grade4;
int grade5;
int sum;
int ave;
System.out.println("Enter the value for Grade1");
grade1 = abejeroact6.nextInt();
System.out.println("Enter the value for Grade2");
grade2 = abejeroact6.nextInt();
System.out.println("Enter the value for Grade3");
grade3 = abejeroact6.nextInt();
System.out.println("Enter the value for Grade4");
grade4 = abejeroact6.nextInt();
System.out.println("Enter the value for Grade5");
grade5 = abejeroact6.nextInt();
sum = grade1+grade2+grade3+grade4+grade5;
ave = sum/5;
System.out.println("Average of the Student\t" +(ave));
}
}

Ask Input to the User; Using Mathematical Operations in Java

import java.util.Scanner;
public class abejeroact5 {
public static void main (String[] arguments) {
Scanner abejeroact5 = new Scanner(System.in);
double sum;
double a,b;
System.out.println("Enter value for A");
a = abejeroact5.nextDouble();
System.out.println("Enter value for B");
b = abejeroact5.nextDouble();
sum = a+b;
System.out.print("Sum is " +sum);
}
}

Using Mathematical Operation 2 in Java

public class abejeroact4 {
public static void main(String a[])
{
int A = 75;
int B = 85;
int C = 95;
int D = 100;
int E = 101;
System.out.println("Ave\t" +((A+B+C+D+E)/5));

}
}

Using Mathematical Operations in Java

public class abejeroact3 {
public static void main(String a[])
{
int A = 100;
int B = 96;
System.out.println("A\t"+A);
System.out.println("B\t"+B);
System.out.println("Sum\t"+(A+B));

}
}

Displaying Bio Data in Java

public class abejeroact2 {
public static void main (String a[])
{
System.out.println("BIO DATA");
System.out.println("NAME: Joshua D. Abejero");
System.out.println("BIRTHDAY: August 11, 1996");
System.out.println("ADDRESS: UP Teacher's Village Alawihao, Daet, Camarines Norte");
System.out.println("COURSE: Batchelor of Science in Information Technology");
System.out.println("MOTHER: Marilyn Dawi Abejero");
System.out.println("FATHER: Melchor Victa Abejero");
System.out.println("CAREER OBJECTIVE:I choose this course for me to improve my skills, not only in handling computer but also in but also in making my own program. In my life I always dream to take part by making progress in the world of modern computers. It is a great honor to be in this Course, Class and School/Community. My dream after 4 years, Im working on a Company somewhere abroad, but I think it would be better to have a job inside the Philippines, to help my Nation to boost up in Technological Status.");
}
}

Displaying "Hello" and "Name" in Java

public class abejeroact1 {
public static void main (String args[])
{
System.out.println("Hello");
System.out.println("NAME: JOSHUA D. ABEJERO");
}
}