Answer:
| Expression | Substring | Comment |
|---|---|---|
| String snake = "Rattlesnake"; | "Rattlesnake" | Create original String |
| snake.substring(6) | "snake" | Characters starting at character 6 to the end |
| snake.substring(0) | "Rattlesnake" | The new substring contains all the characters of the original string |
| snake.substring(10) | "e" | Character 10 is the last one |
| snake.substring(11) | "" | If beginIndex==length, an empty substring is created. |
| snake.substring(12) | If beginIndex is greater than length, a IndexOutOfBoundsException is thrown. |
Another substring()
Here is another method of String objects:
substring(int beginIndex, int endIndex)
This method creates a new String containing characters from the
original string starting at beginIndex and ending at endIndex-1.
Warning: the character at endIndex is not included.
| Expression | Result |
|---|---|
String source = "Subscription"; | "Subscription" |
source.substring(0,3) | "Sub" |
source.substring(3,9) | "script" |
source.substring(0,0) | "" |
source.substring(0,1) | "S" |
source.substring(0,source.length()) | "Subscription" |
The length of the resulting substring is endIndex-beginIndex.
QUESTION 20:
Examine the following code:
String stars = "*****" ;
int j = 1;
while ( j <= stars.length() )
{
System.out.println( stars.substring(0,j) );
j = j+1;
}