Java Codes Basic to Advance

// 6. indexOf()

public class IndexOfExample {
    public static void main(String[] args) {
        String str = "Hello, World!";
        int index = str.indexOf('o');
        System.out.println("Index of 'o': " + index);
    }
}

// 5. substring()

public class SubstringExample {
    public static void main(String[] args) {
        String str = "Hello, World!";
        String substring = str.substring(7);
        System.out.println("Substring from index 7: " + substring);
    }
}

// 4. equals()

public class StringEqualityExample {
    public static void main(String[] args) {
        String str1 = "hello";
        String str2 = "HELLO";
        boolean isEqual = str1.equals(str2);
        System.out.println("Are strings equal? " + isEqual);
    }
}

// 3. toLowerCase()

public class LowerCaseExample {
    public static void main(String[] args) {
        String str = "Hello, World!";
        String lowerCaseString = str.toLowerCase();
        System.out.println("Lowercase string: " + lowerCaseString);
    }
}

// 2. toUpperCase()

public class UpperCaseExample {
    public static void main(String[] args) {
        String str = "Hello, World!";
        String upperCaseString = str.toUpperCase();
        System.out.println("Uppercase string: " + upperCaseString);
    }
}

// 1. length()

public class StringLengthExample {
    public static void main(String[] args) {
        String str = "Hello, World!";
        int length = str.length();
        System.out.println("Length of the string: " + length);
    }
}

40+ String methods of java 👇 (Share)

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pt

And then your code without parenthesis Full example

"Start"
Pt "hi this is mine short java"
"End"

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import java.util.Scanner;

"Start"
        Scanner scanner = new Scanner(System.in);

        Pt"Enter an integer: "
        int number = scanner.nextInt();

        Pt"You entered: " + number

        scanner.close();

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// Run and see bharateey flag clolours

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

System.out.println(" Ye Hain\n bharat ke flag\n\"ke colours\"");
 }
}

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// Factotial from recursion in java

import java.util.Scanner;

public class Main {
public static void main(String[] args) {
  
Scanner s = new Scanner(System.in);
System.out.print("Enter Number: " );
int n = s.nextInt();
if(n>26)
System.out.print("Please enter number less than 25\n" );
else{
  
System.out.println("Showing factorial for "+ n + " Number" );
System.out.print("\n" +Main.f(n));
}
}

// Factorial value calculation + series printing
static long f(long n){
  if (n==1){
   System.out.print(n);
     return n;
  }
  else{
     System.out.print(n + " * ");
     return n*f(n-1);
   }
}

}  // @Java_Codes_Pro

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// Atithmetic Operations in Java

public class MyClass {
  public static void main(String args[]) {
     
     // declaring variables 
     int add, sub, div, mul, rem;
     
     // Declaring two varables
     int x=4;
     int y=2;
     
     // performing Operations
     add = x+y;    // Addition 
     sub = x-y;     // Subtraction
     div = x/y;      // Division
     mul = x+y;     // Multiply 
     rem= x%y;     // reminder
     
     // Showing results
     System.out.println("4 + 2 = "+ add);
     System.out.println("4 - 2 = "+ sub);
     System.out.println("4 * 2 = "+ mul);
     System.out.println("4 / 2 = "+ div);
     System.out.println("4 % 2 = "+ rem);
  }
}

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