Q. What is an immutable object?
Q. Which of the following is not a valid way to create String object?
Q. String objects are stored in a special memory area known as?
Q. What will be the result of given code?
String str = "Java";
String str1 = new String("Java");
System.out.println(str.equals(str1));
System.out.println(str == str1);
System.out.println( str.compareTo(str1) );
Q. What will be the result of given code?
String str = "StudyTonight";
str.concat(".com");
str = str.toUpperCase();
str.replace("TONIGHT","today");
System.out.println(str);
Q. How many new objects are created in given code?
String str = new String("Hello");
Q. Which method is used to convert a primitive type into String?
Q. Which method is used to remove leading and trailing whitespace(s)?
Q. What will be the output of following code?
String str = "Java was developed by James Ghosling";
System.out.println(str.substring(19));
Q. What will happen if you try to run the following code?
String str = "Java Learners";
StringBuffer sb = new StringBuffer();
for(int i=0; i < str.length(); i++)
sb.append(str.charAt(i));
System.out.println(sb);
Q. Which class is used to create mutable and non-synchronised string?
