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Java String length() method

The length() of a String object returns the length of this string. The length of java string is same as the unicode code units of the string.

Syntax:

There is no parameter for length() and it returns the count of total number of characters. Also note that the method is not static, this means that the method can only be invoked through a Java String instance.

Example

Output:

How check the String is empty or not?

The following Java program check whether the string is empty or not.

Output:

Printing one char on each line in Java

The following program display each character in a string one by one.

Output:

What is the maximum size of string in Java?

Strings contain an array of chars. You should be able to get a String of length Integer.MAX_VALUE (always 2147483647 (2^31 - 1) by the Java specification, the maximum size of an array, which the String class uses for internal storage) or half your maximum heap size (since each character is two bytes), whichever is smaller.









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