Java - a generic Java class instantiation example
less than 1 minute read
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
| public class CommandFactory {
public static <T extends Command<R>, R extends CommandResult> T createCommand(Class<T> classObject, Object... params) {
try {
T newInstance = classObject.newInstance();
if (newInstance.initialize(params)) {
return newInstance;
}
} catch (Exception e) {
}
assert false;
return null;
}
}
public class TestCommandResult extends CommandResult {
}
public class TestCommand extends Command<TestCommandResult> {
private int index;
public TestCommand() {
}
public bool initialize(int idx) {
this.index = idx;
}
}
TestCommand testCmd = CommandFactory.<TestCommand, TestCommandResult>createCommand(TestCommand.class, 1);
|