Write a menu driven program to display the pattern as per user’s choice.
Java Programming Language (Article) (Program)
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Write a menu driven program to display the pattern as per user’s choice.
Pattern 1
ABCDE
ABCD
ABC
AB
A
Pattern 2
B
LL
UUU
EEEE
For an incorrect option, an appropriate error message should be displayed.
Program:
<span class="kwd">import</span><span class="pln"> java</span><span class="pun">.</span><span class="pln">util</span><span class="pun">.</span><span class="typ">Scanner</span><span class="pun">;</span><span class="pln"> </span><span class="kwd">public</span><span class="pln"> </span><span class="kwd">class</span><span class="pln"> </span><span class="typ">RansariMenuPattern</span><span class="pln"> </span><span class="pun">{</span><span class="pln"> </span><span class="kwd">public</span><span class="pln"> </span><span class="kwd">static</span><span class="pln"> </span><span class="kwd">void</span><span class="pln"> main</span><span class="pun">(</span><span class="typ">String</span><span class="pln"> args</span><span class="pun">[])</span><span class="pln"> </span><span class="pun">{</span><span class="pln"> </span><span class="typ">Scanner</span><span class="pln"> </span><span class="kwd">in</span><span class="pln"> </span><span class="pun">=</span><span class="pln"> </span><span class="kwd">new</span><span class="pln"> </span><span class="typ">Scanner</span><span class="pun">(</span><span class="typ">System</span><span class="pun">.</span><span class="kwd">in</span><span class="pun">);</span><span class="pln"> </span><span class="typ">System</span><span class="pun">.</span><span class="kwd">out</span><span class="pun">.</span><span class="pln">println</span><span class="pun">(</span><span class="str">"Enter 1 for pattern 1"</span><span class="pun">);</span><span class="pln"> </span><span class="typ">System</span><span class="pun">.</span><span class="kwd">out</span><span class="pun">.</span><span class="pln">println</span><span class="pun">(</span><span class="str">"Enter 2 for Pattern 2"</span><span class="pun">);</span><span class="pln"> </span><span class="typ">System</span><span class="pun">.</span><span class="kwd">out</span><span class="pun">.</span><span class="kwd">print</span><span class="pun">(</span><span class="str">"Enter your choice: "</span><span class="pun">);</span><span class="pln"> </span><span class="kwd">int</span><span class="pln"> choice </span><span class="pun">=</span><span class="pln"> </span><span class="kwd">in</span><span class="pun">.</span><span class="pln">nextInt</span><span class="pun">();</span><span class="pln"> </span><span class="kwd">switch</span><span class="pln"> </span><span class="pun">(</span><span class="pln">choice</span><span class="pun">)</span><span class="pln"> </span><span class="pun">{</span><span class="pln"> </span><span class="kwd">case</span><span class="pln"> </span><span class="lit">1</span><span class="pun">:</span><span class="pln"> </span><span class="kwd">for</span><span class="pln"> </span><span class="pun">(</span><span class="kwd">int</span><span class="pln"> i </span><span class="pun">=</span><span class="pln"> </span><span class="lit">69</span><span class="pun">;</span><span class="pln"> i </span><span class="pun">>=</span><span class="pln"> </span><span class="lit">65</span><span class="pun">;</span><span class="pln"> i</span><span class="pun">--)</span><span class="pln"> </span><span class="pun">{</span><span class="pln"> </span><span class="kwd">for</span><span class="pln"> </span><span class="pun">(</span><span class="kwd">int</span><span class="pln"> j </span><span class="pun">=</span><span class="pln"> </span><span class="lit">65</span><span class="pun">;</span><span class="pln"> j </span><span class="pun"><=</span><span class="pln"> i</span><span class="pun">;</span><span class="pln"> j</span><span class="pun">++)</span><span class="pln"> </span><span class="pun">{</span><span class="pln"> </span><span class="typ">System</span><span class="pun">.</span><span class="kwd">out</span><span class="pun">.</span><span class="kwd">print</span><span class="pun">((</span><span class="kwd">char</span><span class="pun">)</span><span class="pln">j</span><span class="pun">);</span><span class="pln"> </span><span class="pun">}</span><span class="pln"> </span><span class="typ">System</span><span class="pun">.</span><span class="kwd">out</span><span class="pun">.</span><span class="pln">println</span><span class="pun">();</span><span class="pln"> </span><span class="pun">}</span><span class="pln"> </span><span class="kwd">break</span><span class="pun">;</span><span class="pln"> </span><span class="kwd">case</span><span class="pln"> </span><span class="lit">2</span><span class="pun">:</span><span class="pln"> </span><span class="typ">String</span><span class="pln"> word </span><span class="pun">=</span><span class="pln"> </span><span class="str">"BLUE"</span><span class="pun">;</span><span class="pln"> </span><span class="kwd">int</span><span class="pln"> len </span><span class="pun">=</span><span class="pln"> word</span><span class="pun">.</span><span class="pln">length</span><span class="pun">();</span><span class="pln"> </span><span class="kwd">for</span><span class="pun">(</span><span class="kwd">int</span><span class="pln"> i </span><span class="pun">=</span><span class="pln"> </span><span class="lit">0</span><span class="pun">;</span><span class="pln"> i </span><span class="pun"><</span><span class="pln"> len</span><span class="pun">;</span><span class="pln"> i</span><span class="pun">++)</span><span class="pln"> </span><span class="pun">{</span><span class="pln"> </span><span class="kwd">for</span><span class="pun">(</span><span class="kwd">int</span><span class="pln"> j </span><span class="pun">=</span><span class="pln"> </span><span class="lit">0</span><span class="pun">;</span><span class="pln"> j </span><span class="pun"><=</span><span class="pln"> i</span><span class="pun">;</span><span class="pln"> j</span><span class="pun">++)</span><span class="pln"> </span><span class="pun">{</span><span class="pln"> </span><span class="typ">System</span><span class="pun">.</span><span class="kwd">out</span><span class="pun">.</span><span class="kwd">print</span><span class="pun">(</span><span class="pln">word</span><span class="pun">.</span><span class="pln">charAt</span><span class="pun">(</span><span class="pln">i</span><span class="pun">));</span><span class="pln"> </span><span class="pun">}</span><span class="pln"> </span><span class="typ">System</span><span class="pun">.</span><span class="kwd">out</span><span class="pun">.</span><span class="pln">println</span><span class="pun">();</span><span class="pln"> </span><span class="pun">}</span><span class="pln"> </span><span class="kwd">break</span><span class="pun">;</span><span class="pln"> </span><span class="kwd">default</span><span class="pun">:</span><span class="pln"> </span><span class="typ">System</span><span class="pun">.</span><span class="kwd">out</span><span class="pun">.</span><span class="pln">println</span><span class="pun">(</span><span class="str">"Incorrect choice"</span><span class="pun">);</span><span class="pln"> </span><span class="kwd">break</span><span class="pun">;</span><span class="pln"> </span><span class="pun">}</span><span class="pln"> </span><span class="pun">}</span><span class="pln"> </span><span class="pun">}</span>
Output:
Enter 1 for pattern 1 Enter 2 for Pattern 2 Enter your choice: 1 ABCDE ABCD ABC AB A Press any key to continue . . . Enter 1 for pattern 1 Enter 2 for Pattern 2 Enter your choice: 2 B LL UUU EEEE Press any key to continue . . .
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