Java basic

README.md

@@ -3,3 +3,4 @@
 - [Lectures](https://www.youtube.com/playlist?list=PL9gnSGHSqcnr_DxHsP7AW9ftq0AtAyYqJ)
 - [Course website](https://www.techwithkunal.com/courses/dsa)
 - [Assignments](https://github.com/kunal-kushwaha/DSA-Bootcamp-Java/tree/main/assignments) (solutions can be found on LeetCode)
+## this is testing commit

SYLLABUS.md

@@ -1,3 +1,5 @@
+
+
 - [Complete Git & GitHub Course](https://youtu.be/apGV9Kg7ics)
 - [Introduction to Programming](https://youtu.be/wn49bJOYAZM)
     - [Types of languages](https://youtu.be/wn49bJOYAZM?t=171)

classes/day1/dayOne.java

@@ -0,0 +1,35 @@
+public class dayOne{
+    public static void main(String[] args) {
+        // types of language 
+        // procedural 
+        // functional 
+        // object - oriendted 
+
+
+        // static and dynamic language 
+        /*
+         * STATIC = perform type checking at compile time 
+         * delclare dataytpe before you use it , we need to specifies the data type 
+         *  give more control 
+         * 
+         * DYNAMIC = perform type checking at run time 
+         * error will show till program runn 
+         * easy to write code , 
+         * save time 
+         * no need to declare the datatypes of variables 
+         *
+         */
+
+
+         // STACK and HEAP memory 
+         /*
+          * stack store the refernce pointing the object that is acutlly stored in heap 
+                more than one reference variable of one object 
+
+          */
+          // java follow pass by reference 
+          // it dosent have the pass by copy 
+          // garbage collection : none any reference pointyer is pointd toward this object 
+
+    }
+}

classes/day1/dayTwo.java

@@ -0,0 +1,6 @@
+public class dayTwo {
+    /*
+     * flowchart is used for represnt the flow of the program using a set of symbols such as rectangle , sqauare , oval , parrelogram and etc
+     * prime or not 
+     */
+}

classes/day2/Assignment.java

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+import java.util.Scanner;
+
+public class Assignment {
+    public static void main(String[] args) {
+        // program to even and odd 
+            // defining the scanner
+            Scanner input = new Scanner(System.in);
+            // int a ,b;
+            // System.out.println("enter the number");
+            // a = input.nextInt();
+            // if(a%2==0){
+            //     System.out.println("the number is  even");
+            // }else{
+            //     System.out.println("the number is odd");
+            // } assignment 1.1
+
+//            String name ;
+//            name = input.next();
+//            String greet = "hello"+name;
+//            // System.out.println(greet);
+
+// calc
+        System.out.println("enter two number");
+        int a = input.nextInt();
+        int b = input.nextInt();
+        System.out.println("enter the operator");
+        String ch = input.next();
+        if(ch == "+"){
+            System.out.println(a+b);
+        } else if (ch == "-") {
+            System.out.println(a-b);
+        } else if (ch == "*") {
+            System.out.println(a*b);
+
+        }else{
+            System.out.println("worng input");
+        }
+
+
+    }
+}

classes/day2/Main.java

@@ -0,0 +1,31 @@
+import java.nio.file.LinkPermission;
+import java.security.spec.RSAOtherPrimeInfo;
+import java.util.Scanner;
+public class Main {
+    public static void main(String[] args) {
+        System.out.println("this ");
+        // to display something these have a class know as System
+        System.out.print("this is a single line");
+
+        System.out.println("rahul kumar");
+
+        // inputs in java Scanner class
+        // it is availabe in Scanner class
+//        Scanner sc = new Scanner(System.in);
+//      System.out.println(sc.nextInt());
+
+//        int a = 2300_000;
+//        System.out.print(a);
+
+        float num;
+        Scanner sc = new Scanner(System.in);
+        System.out.println("enter the float number");
+        num = sc.nextFloat();
+        System.out.println(num);
+
+
+
+
+
+    }
+}

classes/day2/TypeConversion.java

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+package day2;
+
+import java.util.Scanner;
+
+public class TypeConversion {
+    public static void main(String[] args) {
+        // chainging the type from one datatype to another
+        Scanner sc = new Scanner(System.in);
+        // type should be compactable
+        // destination should be greater than source
+        // type casting = implicit int to float
+        // type casting = explicit like float to int
+        int num = (int)(67.555f);
+//        System.out.println(num);
+    int a = 766;
+     byte b = (byte) (a);
+//     System.out.println(b);
+    }
+}
+

classes/day2/sum.java

@@ -0,0 +1,19 @@
+package day2;
+
+import java.util.Scanner;
+
+public class sum {
+    public static void main(String[] args) {
+        Scanner sc = new Scanner(System.in);
+        System.out.print(("enter the first number "));
+        int num1 = sc.nextInt();
+
+        System.out.print(("enter the second number "));
+        int num2 = sc.nextInt();
+        int sum = num2+num1;
+
+        System.out.println("the additon is "+ sum);
+
+
+    }
+}

classes/day2/temperature.java

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+package day2;
+
+import java.util.Scanner;
+public class temperature {
+    public static void main(String[] args) {
+        Scanner ip = new Scanner(System.in);
+
+        System.out.println("enter the celcius ");
+        float tempC = ip.nextFloat();
+
+  float tempF = (tempC * 9/5)+32;
+  System.out.println("the temp in f is: "+ tempF);
+
+    }
+}

classes/day4/LeapYear.java

@@ -0,0 +1,19 @@
+public class LeapYear {
+    public static void main(String[] args) {
+        int date = 2025;
+        // System.out.println(leapYear(date));
+        System.out.println(leapYear(date));
+    }
+    public static boolean leapYear(int num){
+
+        // leap year must be divisible by 4 ;
+        // leap year must be divisble by 400 ;
+        // and it is not divisible by 100;
+        if ((num % 4 == 0 && num % 100 != 0) || (num % 400 == 0)) {
+            return true;
+        }
+
+    return false;
+
+    }
+}

classes/day4/TypeCheck.java

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+import java.util.Scanner;
+public class TypeCheck {
+    public static void main(String[] args) {
+        Scanner sc = new Scanner(System.in);
+        char ch = sc.next().trim().charAt(0);
+        System.out.println(ch);
+            if(ch =='a' && ch<='z'){
+                System.out.println("this is lowercase");
+            }else{
+                System.out.println("this is lowerCase");
+            }
+
+
+    }
+}

classes/day4/countingOccurence.java

@@ -0,0 +1,18 @@
+public class countingOccurence {
+    public static void main(String[] args) {
+        int number = 17385789;
+        int cnt =0;
+
+        while(number>0){
+
+        int lastDigit = number%10;
+        number = number/10;
+        if(lastDigit ==7){
+            cnt++;
+        }
+
+            }
+
+            System.out.println(cnt);
+    }
+}

classes/day4/fib.java

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+import java.util.Scanner;
+
+public class fib {
+    public static void main(String[] args) {
+        Scanner sc = new Scanner(System.in);
+        int a =0;
+        int b =1;
+        int n = sc.nextInt();
+        for(int i =0;i<n;i++){
+            int temp =b;
+            b = a+b;
+            a = temp;
+            System.out.println(b);
+
+        }  
+        System.out.println(b+"this is the FIBI");
+    }
+
+}

classes/day4/reversh.java

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+public class reversh {
+    public static void main(String[] args) {
+        int n = 123;
+        int temp = 123;
+
+        int rev =0;
+        while(n>0){
+            int rem = n%10;
+            rev = rev*10+rem;
+            n=n/10;
+
+        }
+        System.out.println(("this is the reversh "+ rev));
+        System.out.println(("this is the org "+ temp));
+
+    }
+}

lectures/20-trees/code/AVL/.project

@@ -22,12 +22,12 @@
 	</natures>
 	<filteredResources>
 		<filter>
-			<id>1679078569810</id>
+			<id>1752690996261</id>
 			<name></name>
 			<type>30</type>
 			<matcher>
 				<id>org.eclipse.core.resources.regexFilterMatcher</id>
-				<arguments>node_modules|.git|__CREATED_BY_JAVA_LANGUAGE_SERVER__</arguments>
+				<arguments>node_modules|\.git|__CREATED_BY_JAVA_LANGUAGE_SERVER__</arguments>
 			</matcher>
 		</filter>
 	</filteredResources>

lectures/20-trees/code/Questions/.project

@@ -22,12 +22,12 @@
 	</natures>
 	<filteredResources>
 		<filter>
-			<id>1679078569810</id>
+			<id>1752690996278</id>
 			<name></name>
 			<type>30</type>
 			<matcher>
 				<id>org.eclipse.core.resources.regexFilterMatcher</id>
-				<arguments>node_modules|.git|__CREATED_BY_JAVA_LANGUAGE_SERVER__</arguments>
+				<arguments>node_modules|\.git|__CREATED_BY_JAVA_LANGUAGE_SERVER__</arguments>
 			</matcher>
 		</filter>
 	</filteredResources>