All java codes from basics to advance DSA

Add Code Here/Java/.vscode/settings.json

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+{
+    "java.debug.settings.onBuildFailureProceed": true,
+    "jdk.runConfig.vmOptions": "--enable-preview --source 22"
+}

Add Code Here/Java/Basics/ArithmeticOperation.java

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+
+import java.util.*;
+
+public class ArithmeticOperation{
+      public static void main(String[] args) {
+              Scanner sc = new Scanner(System.in);
+              System.out.print("Enter a first element:");
+              int a = sc.nextInt();
+              System.out.print("Enter a first element:");
+              int b = sc.nextInt();
+              int diff = a-b;
+              int sum = a+b;
+              int multi = a*b;
+              System.out.println("Addition of " + a + " and " + b + " is: " + sum);
+              System.out.println("Subtraction of " + a + " and " + b + " is: " + diff);
+              System.out.println("Multiplication of " + a + " and " + b + " is: " + multi);
+            String name = sc.nextLine();
+            System.out.println(name);
+
+          }
+    }

Add Code Here/Java/Basics/Characterpattern.java

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+import java.util.Scanner;
+
+public class Characterpattern {
+      public static void main(String[] args){
+        Scanner sc = new Scanner(System.in);
+        System.out.print("Enter the no of lines you want to print: ");
+        int a = sc.nextInt();
+        char ch= 'A';
+            for(int i=1;i<=a;i++){
+                for(int j=1;j<=i;j++){
+                    System.out.print(ch);
+                    ch++;
+                }
+                System.out.println("");
+            }
+
+    }
+}

Add Code Here/Java/Basics/Datatype.java

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+
+import com.sun.jdi.BooleanType;
+
+public class Datatype {
+    public static void main(String[] args) {
+        byte b = 8;
+        char ch ="b";
+        boolean var = true;
+        float price = 10.501;
+        int a = 25;
+        short n = 240; 
+
+    }
+
+}

Add Code Here/Java/Basics/Halfpyramid.java

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+import java.util.Scanner;
+
+
+public class Halfpyramid {
+    public static void main(String[] args){
+        Scanner sc = new Scanner(System.in);
+        System.out.print("Enter the no of lines you want to print: ");
+        int a = sc.nextInt();
+            for(int i=1;i<=a;i++){
+                for(int j=1;j<=i;j++){
+                    System.out.print(j);
+                }
+                System.out.println("");
+            }
+
+    }
+}

Add Code Here/Java/Basics/TypeConversion.java

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+public class TypeConversion {
+    public static void main(String[] args) {
+        int a = 10;
+        float b  = 10.52;
+        System.out.println(int));
+        System.out.println(float);
+    }
+}

Add Code Here/Java/Basics/TypePromotion.java

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+
+import java.util.Scanner;
+
+public class TypePromotion {
+    public static void main(String[] args) {
+        Scanner sc = new Scanner(System.in);
+        char a = 'a';
+        char b = 'b';
+        System.out.println((int)a);
+        System.out.println((int)b);
+
+        byte d = 5;
+        d=(byte)(d);
+        System.out.println(d);
+    }
+}

Add Code Here/Java/Basics/Typecasting.java

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+import java.util.Scanner;
+
+public class Typecasting {
+    public static void main(String[] args) {
+        Scanner sc = new Scanner(System.in);
+        float a = 25.10f;
+        int b=(int)a;
+        System.out.print("Float value "+a+" is type cast into integer:");
+        System.out.println(b);
+
+        char ch1 = 'a';
+        char ch2 = 'b';
+        int num1 = ch1;
+        int num2 = ch2;
+        System.out.print("The value of a&b coverted to the Integer: ");
+        System.out.print(num1+ " ");
+        System.out.println(num2+ " ");
+
+
+    }
+}

Add Code Here/Java/Basics/conditionalstatement.java

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+
+import java.util.Scanner;
+
+public class conditionalstatement {
+    public static void main (String[]args){
+        Scanner sc = new Scanner(System.in);
+    //System.out.print("enter your age:");
+    //   int a = sc.nextInt();
+    //   if(a>=18){
+    //     System.out.println("you can vote and drive");
+    //   }
+    //   else{
+    //     System.out.println("you can not vote and drive");
+    //   }
+    System.out.print("Enter A:");
+    int a=sc.nextInt();
+    System.out.print("Enter b:");
+    int b=sc.nextInt();
+if (a>b){
+    System.out.println("a is big");
+}
+else{
+    System.out.println("b is greater");
+}
+    }
+}

Add Code Here/Java/Basics/fibonachiseries.java

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+//fibonachi series in java
+public class fibonachiseries{
+    public static void main(String[]args){
+        //initialize 3 variables
+        int n1,n2,n3,i,count=10;
+        n1=0;
+        n2=1;
+        System.out.print(n1+" "+n2);
+        //using for loop here the value of the i=2 because we already defined n1 and n2         
+        for(i=2;i<=count;++i){    
+                n3=n1+n2;    
+                System.out.print(" "+n3);    
+                n1=n2;    
+                n2=n3;    
+                }    
+    }
+}

Add Code Here/Java/Basics/helloworld.java

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+//first we define class in java
+public class helloworld{
+    // creating function 
+    public static void main(String[] args) {
+       //output function in java 
+        System.out.println("hello sidharth");
+    }
+}
+
+// boiler plate

Add Code Here/Java/Basics/invertedstar.java

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+import java.util.Scanner;
+
+public class invertedstar {
+    public static void main(String[] args) {
+        Scanner sc = new Scanner(System.in);
+        System.out.print("Enter the number of lines you want to print: ");
+        int a = sc.nextInt();
+
+        for (int i = 1; i <= a; i++) {
+            for (int j = 1; j <= (a - i + 1); j++) {
+                System.out.print("*");
+            }
+            System.out.println();  // Move to the next line after printing stars in the current row
+        }
+
+        sc.close();  // Close the scanner
+    }
+}

Add Code Here/Java/Basics/operators.java

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+
+
+
+
+public class operators {
+    public static void main(String[] args){
+                int a=10;
+                int b=2;
+                System.out.println("addition is :" + (a+b));
+                System.out.println("subtraction is :" + (a-b));
+                System.out.println("divison is :" + (a/b));
+                System.out.println("multiplication is :" + (a*b));
+                System.out.println("modulo (remainder)is :" + (a%b));
+
+
+
+    int c=10;
+    //int d=++c;
+   // int e=c;
+    //int f=--c;
+    int g=c--;
+    System.out.println(c);
+    //System.out.println(d);
+    //System.out.println(e);
+   // System.out.println(f);
+    System.out.println(g);
+
+    }
+}

Add Code Here/Java/Basics/primeno.java

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+
+import java.util.Scanner;
+
+public class primeno{
+    public static void main(String[] args){
+
+        scanner imp = new Scanner(System.in);
+
+        System.out.println("FIND GIVEN NO. IS PRIME OR NOT");
+        System.out.print("Enter the number:");
+        int a = sc.next.int();
+
+
+
+
+
+
+    }
+}

Add Code Here/Java/Basics/print stars injava.java

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+class stars{
+    public static void main(String[] args) {
+        System.out.println("*");
+        System.out.println("**");
+        System.out.println("***");
+        System.out.println("****");
+    }
+}

Add Code Here/Java/Basics/starpattern.java

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+import java.util.Scanner;
+
+public class starpattern{
+        public static void main(String[] args) {
+            Scanner sc = new Scanner(System.in);
+
+            System.out.print("Enter the no of lines you want to print: ");
+            int a = sc.nextInt();
+
+
+            for(int i=1;i<=a;i++){
+
+                for(int j=1;j<=i;j++){
+                    System.out.print("*");
+                }
+                System.out.println();
+            }
+        }
+
+}

Add Code Here/Java/Basics/tempCodeRunnerFile.java

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

Add Code Here/Java/Bitwise manipulation/BitManipulation.java

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+package Bitwise manipulation;
+
+
+    public class BitManipulation {
+
+        // Get the i-th bit of a number
+        public static int getIthBit(int num, int i) {
+            int mask = 1 << i;
+            return (num & mask) != 0 ? 1 : 0;
+        }
+
+        // Clear the i-th bit of a number
+        public static int clearIthBit(int num, int i) {
+            int mask = ~(1 << i);
+            return num & mask;
+        }
+
+        // Update the i-th bit of a number to a given value (0 or 1)
+        public static int updateIthBit(int num, int i, int value) {
+            num = clearIthBit(num, i); // First clear the i-th bit
+            int mask = (value << i);
+            return num | mask;
+        }
+
+        // Clear a range of bits from position i to j (inclusive)
+        public static int clearRangeOfBits(int num, int i, int j) {
+            int left = (~0) << (j + 1);   // All 1s till position j and 0s after that
+            int right = (1 << i) - 1;     // All 0s till position i and 1s after that
+            int mask = left | right;      // Combine to create a mask with 0s in range i to j
+            return num & mask;
+        }
+
+        // Count the number of set bits (1s) in a number
+        public static int countSetBits(int num) {
+            int count = 0;
+            while (num != 0) {
+                count += (num & 1);  // Check the least significant bit
+                num >>= 1;           // Right shift the number
+            }
+            return count;
+        }
+
+        public static void main(String[] args) {
+            int num = 29; // Example number in binary: 11101
+
+            System.out.println("Original number: " + num);
+            System.out.println("Get 3rd bit: " + getIthBit(num, 3));
+            System.out.println("Clear 2nd bit: " + clearIthBit(num, 2));
+            System.out.println("Update 1st bit to 0: " + updateIthBit(num, 1, 0));
+            System.out.println("Clear range of bits from 1 to 3: " + clearRangeOfBits(num, 1, 3));
+            System.out.println("Count of set bits: " + countSetBits(num));
+        }
+    }
+
+