import ballerina/io;
public class Counter {
// `private` means accessible only by code within the class definition.
private int n;
// `init` method initializes the object.
public function init(int n = 0) {
self.n = n;
}
public function get() returns int {
// Methods use `self` to access their object.
return self.n;
}
public function inc() {
self.n += 1;
}
}
public function main() {
// Arguments to `new` are passed as arguments to `init`.
Counter counter = new (12);
io:println(counter.get());
}
Defining ClassesModule can contain class definitions.
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import ballerina/io;
public class Counter {
private int n;
private means accessible only by code within the class definition.
public function init(int n = 0) {
self.n = n;
}
init method initializes the object.
public function get() returns int {
return self.n;
Methods use self to access their object.
}
public function inc() {
self.n += 1;
}
}
public function main() {
Counter counter = new (12);
Arguments to new are passed as arguments to init.
io:println(counter.get());
}
bal run defining_classes.bal
12
