Flash cards
Review the key moves
1/4
Core idea
What is the main idea behind Java String codePointBefore() Method?
Lesson checks
Practice each idea before moving on
Short Mimo-style checks built from this lesson's code, terms, and sequence.
1Quick choice
Which statement best captures the main point of this lesson?
2Fill blank
Complete the missing token from the example code.
___ myStr = "Hello";3Order
Put the learning moves in the order that makes the concept easiest to apply.
The codePointBefore() method returns the Unicode value of the character before the specified index in a string.
Definition and Usage
Java String codePointBefore() Method
❮ String Methods
Example
String myStr = "Hello";
int result = myStr.codePointBefore(1);
System.out.println(result);Definition and Usage
The codePointBefore() method returns the Unicode value of the character before the specified index in a string.
The index of the first character is 1, the second character is 2, and so on.
Note
The value 0 will generate an error, as this is a negative number (out of reach).
Syntax
public int codePointBefore(int
index )Parameter Values
| Parameter | Description |
|---|---|
| index | An int value, representing the index following the Unicode that should be returned |
Technical Details
| Returns: | An int value, representing the Unicode value before the specified index |
|---|---|
| Throws: | IndexOutOfBoundsException - if index is negative or not less than the length of the specified string |
| Java Version: | 1.5 |