groovy與java比較,展現groovy的魅力
來來,走過路過的朋友們,來看看Groovy這門程式語言的優勢,太簡潔了
java 原始碼:
import java.util.List;
import java.util.ArrayList;
class Erase {
private List filterLongerThan(List strings, int length) {
List result = new ArrayList();
for (int i = 0; i < strings.size(); i++) {
String s = (String) strings.get(i);
if (s.length() <= length) {
result.add(s);
}
}
return result;
}
public static void main(String[] args) {
List names = new ArrayList();
names.add("Ted");
names.add("Fred");
names.add("Jed");
names.add("Ned");
System.out.println(names);
Erase e = new Erase();
List shortNames = e.filterLongerThan(names, 3);
System.out.println(shortNames.size());
for (int i = 0; i < shortNames.size(); i++) {
String s = (String) shortNames.get(i);
System.out.println(s);
}
}
}
groovy原始碼
class GroovyTest {
void test() {
def names = ["Ted", "Fred", "Jed", "Ned"]
println names
def shortNames = names.findAll{ it -> it.size() <= 3 }
println shortNames.size()
shortNames.each{ it -> println it }
}
static void main(String[] args) {
new GroovyTest().test()
}
}
列印例項:
[Ted, Fred, Jed, Ned]
3
Ted
Jed
Ned