This is a BlueJ Menu
Driven Program to check choice from user (1-20) and display different patterns.
The programs ends when the user enters 0
import
java.util.Scanner;
class
Max
{
Scanner sc=new Scanner(System.in);
void takeChoice()
{
int ch;
System.out.print("\nUser will
enter choice between 1 to 20 to display different patterns\nIf '0' is entered,
the program will be terminated");
do
{
System.out.println("\n\nEnter
Choice (1-14 for numberic pattern, 15-16 for character pattern and 17-20 for
pattern on string, 0 for exit):");
ch=sc.nextInt();
switch(ch)
{
case 1:
pattern1();
break;
case 2:
pattern2();
break;
case 3:
pattern3();
break;
case 4:
pattern4();
break;
case 5:
pattern5();
break;
case 6:
pattern6();
break;
case 7:
pattern7();
break;
case 8:
pattern8();
break;
case 9:
pattern9();
break;
case 10:
pattern10();
break;
case 11:
pattern11();
break;
case 12:
pattern12();
break;
case 13:
pattern13();
break;
case 14:
pattern14();
break;
case 15:
pattern15();
break;
case 16:
pattern16();
break;
case 17:
pattern17();
break;
case 18:
pattern18();
break;
case 19:
pattern19();
break;
case 20:
pattern20();
break;
case 0:
System.out.print("\nEnd
of Program...");
break;
default:
System.out.print("\nEnter Your Choice Properly (1-20).");
}
}while(ch!=0);
}
private
void pattern1()
{
int
i,j,x=1;
for (
i=0;i<=5;i++)
{
for(j=0;j<=i;j++)
{
System.out.print(x);
if(x>0)
x--;
else
x++;
}
System.out.println();
}
}
private
void pattern2()
{
int x;
for(int i=0;i<=4;i++)
{
for(int
j=i;j<=4;j++)
{
x=5-i;
System.out.print(x);
}
System.out.println();
}
}
private void pattern3()
{
int i,j,x;
for(i=0;i<=4;i++)
{
x=1;
for(j=0;j<=4;j++)
{
if(i+j==4)
System.out.print("*");
else
System.out.print(x++);
}
System.out.println();
}
}
private void pattern4()
{
int
i,j,x,y=1;
for(
i=0;i<=2;i++)
{
x=y;
for(j=0;j<=i;j++)
{
System.out.print(" "+x);
x=x-2;
}
System.out.println();
y=y+2;
}
}
private void pattern5()
{
int x;
for(int
i=0;i<=4;i++)
{
x=6;
for(int
j=0;j<=i;j++)
{
System.out.print("
"+x);
x=x+6;
}
System.out.println();
}
}
private
void pattern6()
{
for(int
i=0;i<=4;i++)
{
int
x=5;
for(int
j=0;j<=4;j++)
{
System.out.print(x+
" ");
if(j
x=x-1;
}
System.out.println();
}
}
private
void pattern7()
{
int x;
for(int
i=1;i<=4;i++)
{
x=1;
for(int
j=1;j<=6;j++)
{
System.out.print("
"+x);
x=x+i;
}
System.out.println();
}
}
private
void pattern8()
{
for(int i=0; i<=3; i++)
{
for(int
j=0; j<=i; j++)
{
System.out.print(i+"
");
}
System.out.println();
}
}
private
void pattern9()
{
for(int i=0; i<=3; i++)
{
for(int
j=0; j<=i; j++)
{
System.out.print(j+"
");
}
System.out.println();
}
}
private
void pattern10()
{
for(int i=0; i<=3; i++)
{
for(int
j=i; j<4 j="" o:p="">
{
System.out.print(i+"
");
}
System.out.println();
}
}
private
void pattern11()
{
for(int i=0; i<=3; i++)
{
for(int
j=i; j<=3; j++)
{
System.out.print(j+"
");
}
System.out.println();
}
}
private
void pattern12()
{
int x=1;
for(int i=0; i<=3; i++)
{
for(int
j=0; j<=i; j++)
{
System.out.print(x+"
");
x++;
}
System.out.println();
}
}
private
void pattern13()
{
int x=1;
for(int i=0; i<=3; i++)
{
for(int
j=i; j<=3; j++)
{
System.out.print(x+"
");
x++;
}
System.out.println();
}
}
private
void pattern14()
{
int x=1;
for(int i=0; i<=3; i++)
{
for(int
j=i; j<=3; j++)
{
if (x<10 o:p="">
System.out.print("0"+x+"
");
else
System.out.print(x+"
");
x++;
}
System.out.println();
}
}
private void pattern15()
{
for(int i=0; i<=3; i++)
{
for(int
j=0; j<=3; j++)
{
System.out.print('@');
}
System.out.println();
}
}
private
void pattern16()
{
int x=1;
for(int
i=0;i<=6;i++)
{
for(int
j=0;j<=x-1;j++)
{
System.out.print("*");
}
if(i< 7/2)
x++;
else
x--;
System.out.println();
}
}
private
void pattern17()
{
String
s1;
int
i,j,len,sp=0,c,s=1;
s1="Suddhashil
Chakraborty";
len=s1.length()-1;
for(i=0;i<=len;i++)
{
if(s1.charAt(i)=='
')
s++;
}
while(true)
{
c=0;
if
(s==sp)
break;
sp++;
for(i=0;i<=len;i++)
{
if(s1.charAt(i)=='
')
c++;
if(c==sp)
break;
System.out.print(s1.charAt(i));
}
System.out.println();
}
}
private
void pattern18()
{
int
i,j,len;
String
s1="INDIA";
len=s1.length()-1;
for(i=0;i<=len;i++)
{
for(j=0;j
{
System.out.print(s1.charAt(j));
}
System.out.println();
}
}
private
void pattern19()
{
int
i,j,len;
String
s1="BLUEJ";
len=s1.length();
for
(i=len-1;i>=0;i--)
{
for(j=len-1;j>=i;j--)
System.out.print(s1.charAt(i));
System.out.println();
}
}
private
void pattern20()
{
int
i,j,len;
String
s="BLUEJ";
len=s.length()-1;
for(i=0;
i <=len; i++)
{
for(j=0;j<= i;j++)
{
System.out.print(s.charAt(i));
}
System.out.println();
}
}
public static
void main(String args[])
{
Max
ob=new Max();
ob.takeChoice();
}
}
Sample Input Output
User
will enter choice between 1 to 20 to display different patterns
If '0'
is entered, the program will be terminated
Enter
Choice (1-14 for numberic pattern, 15-16 for character pattern and 17-20 for
pattern on string, 0 for exit):
1
1
01
010
1010
10101
010101
Enter
Choice (1-14 for numberic pattern, 15-16 for character pattern and 17-20 for
pattern on string, 0 for exit):
54
Enter
Your Choice Properly (1-20).
Enter
Choice (1-14 for numberic pattern, 15-16 for character pattern and 17-20 for
pattern on string, 0 for exit):
2
55555
4444
333
22
1
Enter
Choice (1-14 for numberic pattern, 15-16 for character pattern and 17-20 for
pattern on string, 0 for exit):
6
5 5 5 5
5
5 4 4 4
4
5 4 3 3
3
5 4 3 2
2
5 4 3 2
1
Enter
Choice (1-14 for numberic pattern, 15-16 for character pattern and 17-20 for
pattern on string, 0 for exit):
7
1 2 3 4 5 6
1 3 5 7 9 11
1 4 7 10 13 16
1 5 9 13 17 21
Enter
Choice (1-14 for numberic pattern, 15-16 for character pattern and 17-20 for
pattern on string, 0 for exit):
0
End of
Program...
Variable Description
Type of Variable
|
Name of Variable
|
Description
|
int
|
ch
|
This
variable holds user choice
|
int
|
i
|
Loop
Control variable
|
int
|
j
|
Loop
control variable
|
Int
|
x
|
This
variable is used inside loops of function body to display numbers in the
pattern
|
int
|
len
|
This
variable is used inside pattern displaying function body to hold length of
string
|
Scanner
|
sc
|
Input
object
|
String
|
s
|
This
object is used inside pattern displaying function body to hold string value
|
String
|
s1
|
This
object is used inside pattern displaying function body to hold string value
|
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