├── Main (1).java
├── Main.java
├── Prime.java
├── README.md
├── numpat.java
├── pal.java
├── palindrome.java
└── unique.java


/Main (1).java:
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 1 | public class Main
 2 | {
 3 | 	public static void main(String[] args)  
 4 | {  
 5 | int rows=7;      
 6 | //inner loop  
 7 | for (int i= rows-1; i>=0 ; i--)  
 8 | {  
 9 | //outer loop  
10 | for (int j=0; j<=i; j++)  
11 | {  
12 | //prints star and space  
13 | System.out.print(j+1 + " ");  
14 | }  
15 | //throws the cursor in the next line after printing each line  
16 | System.out.println();  
17 | }  
18 | }  
19 | }  
20 | 


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/Main.java:
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 1 | public class Main
 2 | {
 3 | 	public static void main(String[] args)  
 4 | {  
 5 | int rows=7;      
 6 | //inner loop  
 7 | for (int i= rows-1; i>=0 ; i--)  
 8 | {  
 9 | //outer loop  
10 | for (int j=0; j<=i; j++)  
11 | {  
12 | //prints star and space  
13 | System.out.print(j+1 + " ");  
14 | }  
15 | //throws the cursor in the next line after printing each line  
16 | System.out.println();  
17 | }  
18 | }  
19 | }  
20 | 


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/Prime.java:
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 1 | public class Prime {
 2 | 
 3 |     public static void main(String[] args) {
 4 | 
 5 |         int num = 29;
 6 |         boolean flag = false;
 7 |         for (int i = 2; i <= num / 2; ++i) {
 8 | 
 9 |             if (num % i == 0) {
10 |                 flag = true;
11 |                 break;
12 |             }
13 |         }
14 | 
15 |         if (!flag)
16 |             System.out.println(num + " is a prime number.");
17 |         else
18 |             System.out.println(num + " is not a prime number.");
19 |     }
20 | }
21 | 


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/README.md:
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1 | # Java_class_programs
2 | including programs of java
3 | 


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/numpat.java:
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 1 | public class numpat 
 2 | {
 3 | 	public static void main(String[] args)  
 4 | {  
 5 | int rows=5;      
 6 | for (int i= 1  ; i<=rows ; i++)  
 7 | { 
 8 | for (int j=1; j<=rows; j++)  
 9 | { 
10 |      if(j==i)
11 |     { System.out.print("0 ");
12 |       
13 |     }   
14 |     //
15 |     else
16 |     {
17 |         System.out.print(j + " ");
18 |     }
19 | }  
20 | System.out.println();  
21 | }  
22 | }  
23 | }
24 |     
25 | 


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/pal.java:
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 1 | class pal {
 2 |     public static void main(String[] args) {
 3 |       
 4 |       int num = 121, reversedNum = 0, remainder;
 5 |       
 6 |       // store the number to originalNum
 7 |       int originalNum = num;
 8 |       
 9 |       // get the reverse of originalNum
10 |       // store it in variable
11 |       while (num != 0) {
12 |         remainder = num % 10;
13 |         reversedNum = reversedNum * 10 + remainder;
14 |         num /= 10;
15 |       }
16 |       
17 |       // check if reversedNum and originalNum are equal
18 |       if (originalNum == reversedNum) {
19 |         System.out.println(originalNum + " is Palindrome.");
20 |       }
21 |       else {
22 |         System.out.println(originalNum + " is not Palindrome.");
23 |       }
24 |     }
25 |   }
26 | 


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/palindrome.java:
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 1 | public class palindrome {
 2 |     public static void main(String[] args) {
 3 |   
 4 |       String str = "Radar", reverseStr = "";
 5 |       
 6 |       int strLength = str.length();
 7 |   
 8 |       for (int i = (strLength - 1); i >=0; --i) {
 9 |         reverseStr = reverseStr + str.charAt(i);
10 |       }
11 |   
12 |       if (str.toLowerCase().equals(reverseStr.toLowerCase())) {
13 |         System.out.println(str + " is a Palindrome String.");
14 |       }
15 |       else {
16 |         System.out.println(str + " is not a Palindrome String.");
17 |       }
18 |     }
19 |   }
20 | 


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/unique.java:
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 1 | public class unique
 2 | {
 3 | 	public static void main(String[] args)  
 4 | {  
 5 | int rows=5;      
 6 | for (int i= 1  ; i<=rows ; i++)  
 7 | { 
 8 | for (int j=1; j<=rows; j++)  
 9 | { 
10 |      if(j==i)
11 |     { System.out.print("0 ");
12 |     for(int k=0; k<rows-j; k++)
13 |       System.out.print(j + " ");
14 |     }
15 |     if(j<i)
16 |     {
17 |        System.out.print(j + " ");
18 |     }
19 | }  
20 | System.out.println();  
21 | }  
22 | }  
23 | }
24 | 


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