java String

 Program :- 1

class Demo {
 public static void main(String[] args){
        String s1= new String(" sonu");
        System.out.println(s1);

}
    
    }


//Output
// C:\VSjava>javac Testing.java

// C:\VSjava>java Demo
//  sonu

// C:\VSjava>

Program :- 2

class Demo {
 public static void main(String[] args){
       String s1=" sonu";
        System.out.println(s1);

}
    
    }


//Output
// C:\VSjava>javac Testing.java

// C:\VSjava>java Demo
//  sonu

// C:\VSjava>

Program :- 3

class Demo {
 public static void main(String[] args){
       StringBuffer s1= new StringBuffer( " sonu ku");
        System.out.println(s1);

}
    
    }


//Output
// C:\VSjava>javac  Testing.java

// C:\VSjava>java Demo
//  sonu ku

// C:\VSjava>

Program :- 4

class Demo {
 public static void main(String[] args){
       StringBuilder s1= new StringBuilder( " sonu ku");
        System.out.println(s1);

}
    
    }


//Output
// C:\VSjava>javac Testing.java

// C:\VSjava>java Demo
//  sonu ku

// C:\VSjava>

Program :- 5

class Demo {
    StringBuilder s1= new StringBuilder( " sonu ku");
 public static void main(String[] args){
      
        System.out.println(s1);

}
    
    }


//Output
// C:\VSjava>javac Testing.java
// Testing.java:5: error: non-static variable s1 cannot be referenced from a static context
//         System.out.println(s1);
//                            ^
// 1 error

// C:\VSjava>

Program :- 6

class Demo {
    
 public static void main(String[] args){
     char[] c={'s','o','n','u'};
    String s1= new String( c);
      
        System.out.println(s1);

}
    
    }


//Output
// C:\VSjava>javac Testing.java

// C:\VSjava>java Demo
// sonu

// C:\VSjava>

Program :- 7

class Demo {
    
 public static void main(String[] args){
     
   String s1= new String("deepak");
   s1=s1.concat("     kumar ");

   System.out.println(s1);

}
     }


//Output
// C:\VSjava>javac Testing.java

// C:\VSjava>java Demo
// deepakkumar

// C:\VSjava>

Program :- 8

class Demo {
    
 public static void main(String[] args){
     
   String s1 ="deepak";
    s1= "sonu";
  

   System.out.println(s1);

}
     }


//Output
// C:\VSjava>javac Testing.java

// C:\VSjava>java Demo
// sonu

// C:\VSjava>



 String function/method


                    Program :- 9

package java_string;

import java.util.Scanner;


public class Java_string {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
       // String s=input.nextString();
       System.out.print("Enter a string: ");  
        String str= sc.nextLine();  
         System.out.println(str);
       
       
    }
}
output
Enter a string:  This is java language
 This is java language
BUILD SUCCESSFUL (total time: 35 seconds)


Program :- 10
import java.util.Scanner;

public class upercase {
     public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
       // String s=input.nextString();
       System.out.print("Enter a string: ");  
        String str= sc.nextLine();  
        System.out.println(str.toUpperCase());
       
       
       
    }
   
   
}

output
Enter a string:  java is a opject orinted language
 JAVA IS A OPJECT ORINTED LANGUAGE
BUILD SUCCESSFUL (total time: 35 seconds)


Program :- 11
package java_string;

import java.util.Scanner;


public class Lowercase {
     public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
       // String s=input.nextString();
       System.out.print("Enter a string: ");  
        String str= sc.nextLine();
        System.out.println(str.toLowerCase());
       
       
       
    }
         
   
}
output
Enter a string: THIS IS A LANGUAGE
this is a language
BUILD SUCCESSFUL (total time: 14 seconds)


Program :- 12

import java.util.Scanner;
public class ex1 {
    public static void main(String[] args) {
          Scanner sc = new Scanner(System.in);
       
       System.out.print("Enter a string: ");  
        String str= sc.nextLine();
        System.out.println(str.charAt(0));
        System.out.println(str.charAt(3));
    }
   
   
}
output
Enter a string: this is lang
t
s
BUILD SUCCESSFUL (total time: 11 seconds)

Program :- 13
package java_string;

import java.util.Scanner;


public class length {
     public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
       // String s=input.nextString();
       System.out.print("Enter a string: ");  
        String str= sc.nextLine();  
         System.out.println(str.length());
       
       
    }    
}
output
Enter a string: string function
15
BUILD SUCCESSFUL (total time: 52 seconds)


Program :- 14
package java_string;

import java.util.Scanner;


public class replace {

     public static void main(String[] args) {
         
     
        Scanner sc = new Scanner(System.in);
       // String s=input.nextString();
       System.out.print("Enter a string: ");  
        String str= sc.nextLine();  
        String replaceString=str.replace("Java","c++");//replaces all occurrences of "Java" to "Kava"  
        System.out.println(replaceString);
  }    
}
output
Enter a string: Java is a programming language. Java is a platform. Java is an Island
c++ is a programming language.
c++ is a platform. c++ is an Island
BUILD SUCCESSFUL (total time: 26 seconds)

Program :- 15      string intern()

import java.util.Scanner;
package java_string;
public class Intern {
   
    public static void main(String[] args) {
       
     Scanner sc = new Scanner(System.in);
     System.out.print("Enter a string: ");  
        String str= sc.nextLine();
        String s2=str.intern();    
System.out.println(s2);
   
}
}
output
Enter a string: i'msonu
i'msonu
BUILD SUCCESSFUL (total time: 10 seconds)


Program :- 16


package java_string;

import java.util.Scanner;

public class concat {
   
    public static void main(String[] args) {
       
     Scanner sc = new Scanner(System.in);
     System.out.print("Enter a string: ");  
        String str= sc.nextLine();
        System.out.print("Enter  2nd string: ");  
        String str2= sc.nextLine();
       
         String s3=str.concat(str2);
        System.out.println(s3);    
}
}


output
Enter a string: string
Enter a 2nd string: buffer
stringbuffer
BUILD SUCCESSFUL (total time: 17 seconds)
Program :- 17

package java_string;

import java.util.Scanner;

public class pulase_operater {
   

   
    public static void main(String[] args) {
       
     Scanner sc = new Scanner(System.in);
     System.out.print("Enter a string: ");  
        String str= sc.nextLine();
        System.out.print("Enter a 2nd string: ");  
        String str2= sc.nextLine();
       
         String s3=str.concat(str2);
        System.out.println(str+str2);    
}
}
   
output
Enter a string: sonu
Enter a 2nd string: kumar
sonukumar
BUILD SUCCESSFUL (total time: 12 seconds)

Program :- 18
package java_string;

import java.util.Scanner;


public class compareto {
    public static void main(String[] args) {
       
     Scanner sc = new Scanner(System.in);
     System.out.print("Enter a string: ");  
        String str= sc.nextLine();
        System.out.print("Enter a 2nd string: ");  
        String str2= sc.nextLine();
        System.out.print("Enter a 3nd string: ");  
        String str3= sc.nextLine();
       
         System.out.println(str.compareTo(str2));
        System.out.println(str2.compareTo(str3));
        System.out.println(str3.compareTo(str));  
}
}

output
Enter a string: Uttam
Enter a 2nd string: Uttam
Enter a 3nd string: Singh
0
2
-2
BUILD SUCCESSFUL (total time: 27 seconds)

Program :- 19
public class equleto {
    public static void main(String[] args) {
       
   
    Scanner sc = new Scanner(System.in);
     System.out.print("Enter a string: ");  
        String str= sc.nextLine();
        System.out.print("Enter a 2nd string: ");  
        String str2= sc.nextLine();
        System.out.print("Enter a 2nd string: ");  
        String str3= sc.nextLine();
   
      System.out.println(str.equals(str2));
        System.out.println(str2.equalsIgnoreCase(str2));
   
}

output
Enter a string: java
Enter a 2nd string: java
Enter a 2nd string: c++
true
true
BUILD SUCCESSFUL (total time: 20 seconds)

Program :-20
package java_string;


public class ex12 {
   
    public static void main(String[] args) {
 
       
        String name = "javalanguage";
        System.out.println("Original String: " + name);
        String firstLetStr = name.substring(0, 1);
        String remLetStr = name.substring(1);
 
       
        firstLetStr = firstLetStr.toUpperCase();
 
        String firstLetterCap = firstLetStr + remLetStr;
        System.out.println("String with first letter as Capital: " + firstLetterCap);
 
    }
}
output
Original String: javalanguage
String with first letter as Capital: Javalanguage
BUILD SUCCESSFUL (total time: 1 second)



Program :- 21

import java.util.Scanner;
package java_string;


public class ex12 {
   
    public static void main(String[] args) {
 
        Scanner sc= new Scanner(System.in);
         System.out.print("Enter a string: ");
        String name= sc.nextLine();
     
       
        System.out.println("Original String: " + name);
        String firstLetStr = name.substring(0, 1);
        String remLetStr = name.substring(1);
 
        // convert the first letter of String to uppercase
        firstLetStr = firstLetStr.toUpperCase();
 
        // concantenate the first letter and remaining string
        String firstLetterCap = firstLetStr + remLetStr;
        System.out.println("String with first letter as Capital: " + firstLetterCap);
 
    }
}
   


output
Enter a string: java
Original String: java
String with first letter as Capital: Java
BUILD SUCCESSFUL (total time: 7 seconds)
Program :- 22
public class ex13 {
   


    public static void main(String[] args) {
        // create a string
        String str = "this is java code";
        String words[]=str.split("\\s");
        String capStr="";
 
        for(String word:words){
            // Capitalize first letter
            String firstLetter=word.substring(0,1);
            // Get remaining letter
            String remainingLetters=word.substring(1);
            capStr+=firstLetter.toUpperCase()+remainingLetters+" ";
        }
        System.out.println(capStr);
    }
}

output
This Is Java Code
BUILD SUCCESSFUL (total time: 1 second)

Program :- 23
import java.util.Scanner;
package java_string;
public class ex13 {
   


    public static void main(String[] args) {
        Scanner sc=new Scanner(System.in);
        // create a string
        System.out.print("Enter a string: ");
        String str=sc.nextLine();
       
        String words[]=str.split("\\s");
        String capStr="";
 
        for(String word:words){
            // Capitalize first letter
            String firstLetter=word.substring(0,1);
            // Get remaining letter
            String remainingLetters=word.substring(1);
            capStr+=firstLetter.toUpperCase()+remainingLetters+" ";
        }
        System.out.println(capStr);
    }
}

output
run:
Enter a string: java is a best programming languagae
Java Is A Best Programming Languagae
BUILD SUCCESSFUL (total time: 33 seconds)


Program :- 24
Program :- 25
Program :- 26

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