DEV Community: hema latha

String convert uppercase my name

hema latha — Tue, 11 Mar 2025 16:34:42 +0000

public static void main(String[] args) {
        // TODO Auto-generated method stub
   String name= "hemalatha";
   System.out.println(name.toUpperCase());
    }

out put - HEMALATHA


-----------------

public static void main(String[] args) {
        // TODO Auto-generated method stub
   String name= "hemalatha";
   //System.out.println(name.toUpperCase());
    for(int i=0; i<name.length(); i++)
    {
        char ch = name.charAt(i);
        {
        System.out.print((char)(ch-32));
    }



    }}}

out put --  HEMALATHA

pattern for loop

hema latha — Sun, 02 Mar 2025 18:07:59 +0000

int val= 10;
        for (int row = 1; row<=4; row ++ )
   {
       for(int col = 1; col<=row; col++)
       {
           System.out.print(val+" ");
           val--;
       }
       System.out.println();

}

out put 
10 
9 8 
7 6 5 
4 3 2 1

pattern for loop program

hema latha — Sun, 02 Mar 2025 17:56:37 +0000

public static void main(String[] args) {
        // TODO Auto-generated method stub
        int val=5;
   for(int row = 1; row<=5; row ++ )
   {
       for(int col = 1; col<=row; col++)
       {
           System.out.print(val+" ");
       }
       System.out.println();    
       val--;
   }
out put - 
5 
4 4 
3 3 3 
2 2 2 2 
1 1 1 1 1

pattern program basic

hema latha — Sun, 02 Mar 2025 16:40:03 +0000

public static void main(String[] args) {
        // TODO Auto-generated method stub

        for(int row = 5; row>=3; row-- ) 
        {

        for(int no = 1; no<=5; no++)
       {
           System.out.print(row);

       }
        System.out.println();

    }

out put 
55555
44444
33333

String with no

hema latha — Sun, 02 Mar 2025 13:12:49 +0000

public static void main(String[] a


rgs) {
        // TODO Auto-generated method stub
     String word = "Chennai 600042";
     for (int i = 0; i<word.length();i++ )
     {
         if(word.charAt(i)>='0')
             if(word.charAt (i)<='9')
                     System.out.print(word.charAt(i));
     }

    }

out put 600042

for loop program number pattern 1-10

hema latha — Fri, 14 Feb 2025 10:03:47 +0000

package Forloopbase;
public class Forloop {

public static void main(String[] args) {

    pattern_n();
    pattern2();
    pattern3();
    pattern4();
    pattern5();
    pattern6();
    pattern7();
    pattern8();
    pattern9();
    pattern10();
    patternN();
    patternH();

    // TODO Auto-generated method stub

}
private static void pattern10() {
// TODO Auto-generated method stub
for(int line = 1; line<=9; line++)
{
for(int col=1; col<=9; col++)
{
if(col==1||col==4 ||col==9 ||line==1 && col>4 ||line==9 &&col>4 )
System.out.print("* ");
else {
System.out.print(" ");
}}
System.out.println();
}}
private static void pattern9() {
// TODO Auto-generated method stub
for(int line = 1; line<=9; line++)
{
for(int col=1; col<=9; col++)
{
if(line==1 ||col==1&&line<=5||line==5||col==9)
System.out.print("* ");
else
System.out.print(" ");
}
System.out.println();
}}
private static void pattern8() {
// TODO Auto-generated method stub
for(int line = 1; line<=9; line++)
{
for(int col=1; col<=9; col++)
{
if(line==1 ||line == 9||line==5 || col==1 ||col==9)
System.out.print("* ");
else
System.out.print(" ");

            }
            System.out.println();
        }
}
private static void pattern7() {
    // TODO Auto-generated method stub
    for(int line = 1; line<=9; line++)
    {
        for(int col=1; col<=9; col++)
        {
            if(line==1 ||col==9)
            {System.out.print("* ");
            }
            else {System.out.print("  ");
        }}
        System.out.println();
}}
private static void pattern6() {
    // TODO Auto-generated method stub
    for(int line = 1; line<=9; line++)
    {
        for(int col=1; col<=9; col++)
        {
if (line==1 ||col ==1 ||line==9||line==5||col==9&&line>5)

        {System.out.print("* ");}
            else {
                System.out.print("  ");}}
    System.out.println();
}}
private static void pattern5() {
    // TODO Auto-generated method stub
    for(int line = 1; line<=9; line++)
    {
        for(int col=1; col<=9; col++)
        {

if(line==1 || line==9 || line==5||col==9&& line>=6 || col==1 && line<=5)
{System.out.print("* ");}
else {
System.out.print(" ");
}}
System.out.println();}
}

private static void pattern4() {
    // TODO Auto-generated method stub
    for(int line = 1; line<=9; line++)
    {
        for(int col=1; col<=9; col++)
        {
            if(col==1&&line<6||line==6|| col==5)
                System.out.print("* ");
            else 
                System.out.print("  ");
        }
            System.out.println();
        }
}
private static void pattern2() {
    // TODO Auto-generated method stub
    for(int line = 1; line<=9; line++)
    {
        for(int col=1; col<=9; col++)
        {
 if(line==1||col==9 && line<=5 ||line==5||line==9||col==1&& line>=5)
                {System.out.print("* ");
            }
            else {
                System.out.print("  ");}}
                System.out.println();
}}
private static void pattern3() {
    // TODO Auto-generated method stub
    for(int line = 1; line<=9; line++)
    {
        for(int col=1; col<=9; col++)
        {
if(line==1||line==9||line==5 ||col==9)
            System.out.print("* ");
        else 
                if((col==1 && col>5) ||(col==1 && col>6))     
                System.out.print("* ");
                else
                    System.out.print("  ");}
                  System.out.println();

}}

private static void pattern_n() {
    // TODO Auto-generated method stub
    for(int line = 1; line<=9; line++)
    {
        for(int col=1; col<=9; col++)
        {
if(  col == 5 ||line==9 || col+line==6)
            System.out.print("* ");
        else 

                System.out.print("  ");}
System.out.println();

}}

private static void patternN() {
    // TODO Auto-generated method stub
    for(int line = 1; line<=9; line++)
    {
        for(int col=1; col<=9; col++)
        {
if(  col == 1 ||col==9  || line==col)
            System.out.print("* ");
        else 

                System.out.print("  ");}
System.out.println();

}}

private static void patternH() {
    // TODO Auto-generated method stub
    for(int line = 1; line<=9; line++)
    {
        for(int col=1; col<=9; col++)
        {
if(  col == 1 ||col==9 ||line==5 )
            System.out.print("* ");
        else 

                System.out.print("  ");}
System.out.println();

}}
private static void pattern1() {
    // TODO Auto-generated method stub
    for(int line = 1; line<=9; line++)
    {
        for(int col=1; col<=9; col++)
        {
if( line==1 || line==9 || col == 1 ||col==9 ||line==col |line+col==10)
            System.out.print("* ");
        else 

                System.out.print("  ");}
System.out.println();
            }}}

out put
*

* *

* *

*
- *
  - * * * * * * * * *

            * 
            * 
            *

* * * * * * * * *

            * 
            * 
            *

            * 
            * 
            *

*
*
*
*
* * * * * * * * * * * * *

* * * * * * * * * * * * * * * * * * * * *

* * * * * * * * *
*
*
* * * * * * * * * *

*
*
* * * * * * * * * *
*
*
* * * * * * * * * *

*
*
* * * * * * * * * * * * * *

For loop number patturn

hema latha — Thu, 13 Feb 2025 14:26:43 +0000

public class Forloop {

    public static void main(String[] args) {



        pattern_n();
        pattern2();
        pattern3();
        pattern4();
        pattern5();
        pattern6();
        pattern7();
        pattern8();
        pattern9();
        pattern10();
        //patternN();
        //patternH();


        // TODO Auto-generated method stub      
}
    private static void pattern10() {
        // TODO Auto-generated method stub
        for(int line = 1; line<=9; line++)
        {
            for(int col=1; col<=9; col++)
            { 
if(col==1||col==4 ||col==9 ||line==1 && col>4 ||line==9 &&col>4 ) 
                System.out.print("* ");
            else {
                System.out.print("  ");
            }}
        System.out.println();
    }}
    private static void pattern9() {
        // TODO Auto-generated method stub
        for(int line = 1; line<=9; line++)
        {
            for(int col=1; col<=9; col++)
            { 
                if(line==1 ||col==1&&line<=5||line==5||col==9)
                    System.out.print("* ");
                else 
                    System.out.print("  ");
                            }
            System.out.println();
    }}
    private static void pattern8() {
        // TODO Auto-generated method stub
        for(int line = 1; line<=9; line++)
        {
            for(int col=1; col<=9; col++)
            { 
if(line==1  ||line == 9||line==5 || col==1 ||col==9)
                System.out.print("* ");
                else 
                    System.out.print("  ");

                }
                System.out.println();
            }
    }
    private static void pattern7() {
        // TODO Auto-generated method stub
        for(int line = 1; line<=9; line++)
        {
            for(int col=1; col<=9; col++)
            {
                if(line==1 ||col==9)
                {System.out.print("* ");
                }
                else {System.out.print("  ");
            }}
            System.out.println();
    }}
    private static void pattern6() {
        // TODO Auto-generated method stub
        for(int line = 1; line<=9; line++)
        {
            for(int col=1; col<=9; col++)
            {
    if (line==1 ||col ==1 ||line==9||line==5||col==9&&line>5)

            {System.out.print("* ");}
                else {
                    System.out.print("  ");}}
        System.out.println();
    }}
    private static void pattern5() {
        // TODO Auto-generated method stub
        for(int line = 1; line<=9; line++)
        {
            for(int col=1; col<=9; col++)
            {
if(line==1 || line==9 || line==5||col==9&& line>=6 || col==1 && line<=5)
                    {System.out.print("* ");}
                else {
                    System.out.print("  ");
            }}
                System.out.println();}
            }

    private static void pattern4() {
        // TODO Auto-generated method stub
        for(int line = 1; line<=9; line++)
        {
            for(int col=1; col<=9; col++)
            {
                if(col==1&&line<6||line==6|| col==5)
                    System.out.print("* ");
                else 
                    System.out.print("  ");
            }
                System.out.println();
            }
    }
    private static void pattern2() {
        // TODO Auto-generated method stub
        for(int line = 1; line<=9; line++)
        {
            for(int col=1; col<=9; col++)
            {
     if(line==1||col==9 && line<=5 ||line==5||line==9||col==1&& line>=5)
                    {System.out.print("* ");
                }
                else {
                    System.out.print("  ");}}
                    System.out.println();
    }}
    private static void pattern3() {
        // TODO Auto-generated method stub
        for(int line = 1; line<=9; line++)
        {
            for(int col=1; col<=9; col++)
            {
    if(line==1||line==9||line==5 ||col==9)
                System.out.print("* ");
            else 
                    if((col==1 && col>5) ||(col==1 && col>6))     
                    System.out.print("* ");
                    else
                        System.out.print("  ");}
                      System.out.println();

    }}

    private static void pattern_n() {
        // TODO Auto-generated method stub
        for(int line = 1; line<=9; line++)
        {
            for(int col=1; col<=9; col++)
            {
    if(  col == 5 ||line==9 || col+line==6)
                System.out.print("* ");
            else 

                    System.out.print("  ");}
    System.out.println();

    }}

    private static void patternN() {
        // TODO Auto-generated method stub
        for(int line = 1; line<=9; line++)
        {
            for(int col=1; col<=9; col++)
            {
    if(  col == 1 ||col==9  || line==col)
                System.out.print("* ");
            else 

                    System.out.print("  ");}
    System.out.println();

    }}

    private static void patternH() {
        // TODO Auto-generated method stub
        for(int line = 1; line<=9; line++)
        {
            for(int col=1; col<=9; col++)
            {
    if(  col == 1 ||col==9 ||line==5 )
                System.out.print("* ");
            else 

                    System.out.print("  ");}
    System.out.println();

    }}
    private static void pattern1() {
        // TODO Auto-generated method stub
        for(int line = 1; line<=9; line++)
        {
            for(int col=1; col<=9; col++)
            {
    if( line==1 || line==9 || col == 1 ||col==9 ||line==col |line+col==10)
                System.out.print("* ");
            else 

                    System.out.print("  ");}
    System.out.println();
                }}}

Nested for loop pattern H and N

hema latha — Thu, 13 Feb 2025 04:42:20 +0000

package Forloopbase;

public class Forloop {

public static void main(String[] args) {
    //pattern();
    //pattern1();
    //patternH();
    patternN();
    // TODO Auto-generated method stub

}
private static void patternN() {
// TODO Auto-generated method stub
for(int line = 1; line<=9; line++)
{
for(int col=1; col<=9; col++)
{
if( col == 1 ||col==9 || line==col)
System.out.print("* ");
else

                System.out.print("  ");}
System.out.println();

}}

private static void patternH() {
    // TODO Auto-generated method stub
    for(int line = 1; line<=9; line++)
    {
        for(int col=1; col<=9; col++)
        {
if(  col == 1 ||col==9 ||line==5 )
            System.out.print("* ");
        else 

                System.out.print("  ");}
System.out.println();

}}
private static void pattern1() {
    // TODO Auto-generated method stub
    for(int line = 1; line<=9; line++)
    {
        for(int col=1; col<=9; col++)
        {
if( line==1 || line==9 || col == 1 ||col==9 ||line==col |line+col==10)
            System.out.print("* ");
        else 

                System.out.print("  ");}
System.out.println();
            }}

private static void pattern() {
    // TODO Auto-generated method stub
     for(int line = 1; line<=9; line++)
        {
            for(int col=1; col<=9; col++)
                {System.out.print(" * ");}
            System.out.println();
        }}}

output=

out put

Nested for loop

hema latha — Wed, 12 Feb 2025 18:20:51 +0000

package Forloopbase;

public class Forloop {

public static void main(String[] args) {
    //pattern();
    pattern1();
    // TODO Auto-generated method stub

}
private static void pattern1() {
// TODO Auto-generated method stub
for(int line = 1; line<=9; line++)
{
for(int col=1; col<=9; col++)
{
if( line==1 || line==9 || col == 1 ||col==9 ||line==col |line+col==10)
System.out.print("* ");
else

                System.out.print("  ");}
System.out.println();
            }}

private static void pattern() {
    // TODO Auto-generated method stub
     for(int line = 1; line<=9; line++)
        {
            for(int col=1; col<=9; col++)
                {System.out.print(" * ");}
            System.out.println();
        }}}

out put

For loop basic

hema latha — Wed, 12 Feb 2025 12:08:35 +0000

package Forloopbase;

public class Forloop {

public static void main(String[] args) {
    // TODO Auto-generated method stub
for(int line = 1; line<=5; line++)
{
    for(int col=1; col<=5; col++)
        {System.out.print(" * ");}
    System.out.println();

}  }}

out put -

LCM - Program find out least common multiple

hema latha — Tue, 11 Feb 2025 04:26:20 +0000

package day1;

public class LCM {

public static void main(String[] args) {
    // TODO Auto-generated method stub
 int no1 = 3;
 int no2 = 517;
 int big = 0; 
 if (no1>no2)
     big = no1;
 else 
     big = no2;

 while(true) {
    if(big%no1==0 && big%no2==0)
     {
         System.out.println("LCM is " +big);
         break;          
     }
 big= big+1;                 
}}}

out put === LCM is 1551

Neon number

hema latha — Sat, 08 Feb 2025 01:42:36 +0000

A positive integer whose sum of digits of its square is equal to the number itself is called a neon number.

0-100000 Neon numbers = 0,1,9

package day1;

public class Neon_number {

public static void main(String[] args) {
    // TODO Auto-generated method stub

int no = 9;
int square = no*no;
System.out.println(square);
int result = sum_of_digits(square);
System.out.println(result);
if (result==no)
System.out.println("neon");
else
System.out.println("Not Neon");

}

private static int sum_of_digits(int square) {
    // TODO Auto-generated method stub

    int sum = 0;
    while(square>0)
    {
        sum = sum+square%10;
        square = square/10;
    }
    return sum;



}

}

out put=
81
9
neon