Dealing with Strings

Question 1

String.toLowerCase()

Answer 1

xxx

Question 2

String.format()

Answer 2

xxx

Question 3

Parsing values from String

Answer 3

xxx

Question 4

How to convert int and Integer into String and vice versa?

Answer 4

Convert int to String

• int + “”
• Integer.toString(int)
• String.valueOf(int)
• String.format()

Convert String to int

• Integer.parseInt(String)
• Integer.valueOf(String)

Question 5

String format()

Answer 5

• a method returns the formatted string by given locale, format, and arguments

Question 6

Common String Format Specifiers

Answer 6

• %d: integer -> decimal integer
• %f: floating point -> decimal number
• %e: floating point -> decimal number in scientific notation
• %s: any type -> String value
• %t: Date/Time -> %t is the prefix for Date/Time conversions. More formatting flags are needed after this.