...
String
is associated with string literal in the form of double-quoted texts such as "Hello, world!". You can assign a string literal directly into a String
variable, instead of calling the constructor to create a String
instance.- The
'+'
operator is overloaded to concatenate two String
operands. '+'
does not work on any other objects such as Point
and Circle
. String
is immutable. That is, its content cannot be modified once it is created. For example, the method toUpperCase()
constructs and returns a new String
instead of modifying the its existing content.
Java
...
string vs Python string
In the following example, we initialize an integer to zero, then convert it to a string, then check to see if it is empty. Note the data declaration (highlighted), which is necessary in Java but not in Python. Notice also how verbose Java is, even in an operation as basic as comparing two strings for equality.
Code Block |
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language | java |
---|
title | Strings in Java |
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| int myCounter = 0;
String myString = String.valueOf(myCounter);
if (myString.equals("0")) ... |
| Code Block |
---|
language | py |
---|
title | Strings in Python |
---|
| myCounter = 0
myString = str(myCounter)
if myString == "0": ... |
|
Code Block |
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language | java |
---|
title | Strings in Java |
---|
| // print the integers from 1 to 9
for (int i = 1; i < 10; i++)
{
System.out.println(i);
} |
| Code Block |
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language | py |
---|
title | Strings in Python |
---|
| # print the integers from 1 to 9
for i in range(1,10):
print i |
|