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Questions and Answers
What is the result of the comparison text1.compareToIgnoreCase(text2) given the values of text1 and text2?
What is the result of the comparison text1.compareToIgnoreCase(text2) given the values of text1 and text2?
- 14
- 0
- 7 (correct)
- -7
What is the expected output of text1.compareToIgnoreCase(text3)?
What is the expected output of text1.compareToIgnoreCase(text3)?
- 14
- 0 (correct)
- 7
- -7
What will happen when trying to execute System.out.println(output1,output2,output3,output4);?
What will happen when trying to execute System.out.println(output1,output2,output3,output4);?
- It will generate a runtime error.
- It will print all output values correctly.
- It will cause a compilation error. (correct)
- It will print only the first output value.
Which function is correctly defined to remove whitespace from both ends of a string?
Which function is correctly defined to remove whitespace from both ends of a string?
What will text1.compareToIgnoreCase(text4) return when the values of text1 and text4 are compared?
What will text1.compareToIgnoreCase(text4) return when the values of text1 and text4 are compared?
What is the output of the code snippet that calculates the length of the string 'DATA STRUCTURE WITH JAVA'?
What is the output of the code snippet that calculates the length of the string 'DATA STRUCTURE WITH JAVA'?
Which of the following correctly displays a combination of two strings from the provided strings?
Which of the following correctly displays a combination of two strings from the provided strings?
Which of the following strings is not a valid example from the provided options?
Which of the following strings is not a valid example from the provided options?
How many distinct strings are presented in option c?
How many distinct strings are presented in option c?
Which concept is illustrated by the function string.length() in the provided code?
Which concept is illustrated by the function string.length() in the provided code?
What does the program in 'createStringDemo' print when executed?
What does the program in 'createStringDemo' print when executed?
What is the purpose of the 'trim()' method in the 'TrimStringDemo' class?
What is the purpose of the 'trim()' method in the 'TrimStringDemo' class?
What will be the output of 'text.toUpperCase()' in 'TrimStringDemo'?
What will be the output of 'text.toUpperCase()' in 'TrimStringDemo'?
What will the 'replace(
What will the 'replace(
Which statement is NOT accurate regarding the provided Java program?
Which statement is NOT accurate regarding the provided Java program?
What will 'text.charAt(5)' return in the context of 'TrimStringDemo'?
What will 'text.charAt(5)' return in the context of 'TrimStringDemo'?
Which of the following statements is true regarding the output of 'TrimStringDemo'?
Which of the following statements is true regarding the output of 'TrimStringDemo'?
What is the difference in behavior between System.out.print() and System.out.println()?
What is the difference in behavior between System.out.print() and System.out.println()?
What would happen if the 'trim()' method was not called on 'text' in 'TrimStringDemo'?
What would happen if the 'trim()' method was not called on 'text' in 'TrimStringDemo'?
Which aspect of strings in Java is true?
Which aspect of strings in Java is true?
If a user modified 'createStringDemo' to include a new character in the array, how would that affect the output?
If a user modified 'createStringDemo' to include a new character in the array, how would that affect the output?
If the code 'System.out.println(text)' is used instead of 'System.out.print(text)', what will happen?
If the code 'System.out.println(text)' is used instead of 'System.out.print(text)', what will happen?
Which of the following statements about System.out.print() is true?
Which of the following statements about System.out.print() is true?
In Java, what will happen when trying to change the contents of an existing string variable?
In Java, what will happen when trying to change the contents of an existing string variable?
What is the primary feature of the string 'text' when the Java program runs?
What is the primary feature of the string 'text' when the Java program runs?
When modifying the behavior of the print method, what misconception is commonly held?
When modifying the behavior of the print method, what misconception is commonly held?
What is the output of the expression strOb1 + " and " + strOb2?
What is the output of the expression strOb1 + " and " + strOb2?
Which of the following correctly describes the output of the fourth System.out.println?
Which of the following correctly describes the output of the fourth System.out.println?
What is the purpose of the insert method in StringBuffer?
What is the purpose of the insert method in StringBuffer?
After executing text.delete(14,19);, what will be the state of the StringBuffer text?
After executing text.delete(14,19);, what will be the state of the StringBuffer text?
What will be the result of executing text.reverse(); on the current state of text?
What will be the result of executing text.reverse(); on the current state of text?
What does the append method do in regards to StringBuffer?
What does the append method do in regards to StringBuffer?
What will happen if the code attempts to use strOb2.replace(0, 6, "New String"); without any declaration of strOb2 as a StringBuffer?
What will happen if the code attempts to use strOb2.replace(0, 6, "New String"); without any declaration of strOb2 as a StringBuffer?
What is the effect of the replace method when applied to text?
What is the effect of the replace method when applied to text?
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Study Notes
String Manipulation in Java
System.out.println(aSet);will print the characters in the arrayaSeton a single line, separated by spaces.trim()method removes leading and trailing spaces in a String.toUpperCase()method converts all characters in a String to uppercase.replace(char old, char new)method replaces all occurrences of a character with another character in a String.- Strings in Java are immutable, meaning any operation on a String creates a new String object.
- The
compareToIgnoreCase()method compares two Strings lexicographically, ignoring case. StringBufferis a mutable class, allowing modification of the String it holds.append()method adds a String to the end of a StringBuffer.insert()method inserts a string at a specified index in a StringBuffer.replace()method replaces a substring within a StringBuffer.delete()method removes a substring within a StringBuffer.reverse()method reverses the contents of the StringBuffer.- The
length()method returns the number of characters in a String.
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