Add a static method, public static void changeLetter (StringBuilder sb, char letter) Convert all occurrences of the letter variable in the StringBuilder to upper case. Write in java and use test case example as reference.

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Author:James Kurose, Keith Ross
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Add a static method,

public static void changeLetter (StringBuilder sb, char letter)

Convert all occurrences of the letter variable in the StringBuilder to upper case.

Write in java and use test case example as reference. 

Test Case 1
Enter a String \n
aaa ENTER
which character should be converted to uppercase? In
a ENTER
AAA An
Test Case 2
Enter a String \n
aAaAaAaAaAaAbBbBbBbBbBbBbcCcccccCcccccc ENTER
which character should be converted to uppercase? \n
b ENTER
aAaAaAaAaAaABBBBBBBBBBBBBcCccccCCccCCcc n
Test Case 3
Enter a String \n
aAaAaAaAaAaAbBbBbBbBbBbBbcCcccccCcccccc ENTER
which character should be converted to uppercase? \n
a ENTER
AAAAAAAAAAAAbBbBbBbBbBbBbcCcccccCcccccc n
Test Case 4
Enter a String \n
aAaAaAaAaAaAbBbBbBbBbBbBbcCccccCCccCCcC ENTER
which character should be converted to uppercase? \n
C ENTER
aAaAaAaAaAaAbBbBbBbBbBbBbCcccccccccccc \n
Test Case 5
Enter a String \n
aAaAaAaAaAaAbBbBbBbBbBbBbcCccccCCccCCCCuuuuuuu ENTER
Which character should be converted to uppercase? \n
u ENTER
aAaAaAaAaAaAbBbBbBbBbBbBbcCccccCCccCCCCUUUUUUU \n
Transcribed Image Text:Test Case 1 Enter a String \n aaa ENTER which character should be converted to uppercase? In a ENTER AAA An Test Case 2 Enter a String \n aAaAaAaAaAaAbBbBbBbBbBbBbcCcccccCcccccc ENTER which character should be converted to uppercase? \n b ENTER aAaAaAaAaAaABBBBBBBBBBBBBcCccccCCccCCcc n Test Case 3 Enter a String \n aAaAaAaAaAaAbBbBbBbBbBbBbcCcccccCcccccc ENTER which character should be converted to uppercase? \n a ENTER AAAAAAAAAAAAbBbBbBbBbBbBbcCcccccCcccccc n Test Case 4 Enter a String \n aAaAaAaAaAaAbBbBbBbBbBbBbcCccccCCccCCcC ENTER which character should be converted to uppercase? \n C ENTER aAaAaAaAaAaAbBbBbBbBbBbBbCcccccccccccc \n Test Case 5 Enter a String \n aAaAaAaAaAaAbBbBbBbBbBbBbcCccccCCccCCCCuuuuuuu ENTER Which character should be converted to uppercase? \n u ENTER aAaAaAaAaAaAbBbBbBbBbBbBbcCccccCCccCCCCUUUUUUU \n
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