91 lines
2.1 KiB
Markdown
91 lines
2.1 KiB
Markdown
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# Zusammenfassung:
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Gegeben sei folgender Java-Code:
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```Java
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import java.util.ArrayList;
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import java.util.List;
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class Person {
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String name;
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int age;
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public Person(String name, int age) {
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this.name = name;
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this.age = age;
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}
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public String toString(){
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return this.name + ", Alter: " + this.age;
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}
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}
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public class Main {
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public static void main(String[] args) {
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List<Person> personen = new ArrayList<>();
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personen.add(new Person("Alice", 20));
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personen.add(new Person("Bob", 18));
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personen.add(new Person("Charlie", 30));
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personen.add(new Person("David", 15));
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personen.add(new Person("Eve", 21));
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for (Person p : personen) {
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System.out.println(p);
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}
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int sum = 0;
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for (int i = 1; i <= 10; i++) {
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sum += i;
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}
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System.out.println("Sum of numbers from 1 to 10: " + sum);
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}
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}
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```
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Der Code hat folgende Ausgabe:
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```
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Alice, Alter: 20
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Bob, Alter: 18
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Charlie, Alter: 30
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David, Alter: 15
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Eve, Alter: 21
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Sum of numbers from 1 to 10: 55
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```
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Wandeln sie den Java-Code so in Groovy-Code um, dass er die selbe Ausgabe erzeugt und folgende Groovy-Features benutzt:
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1. String Interpolation
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2. Ranges
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3. Variablendefinition mit **def**
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4. each-Schleifen und Closures
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5. Dynamische Listen
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6. for-in Schleifen
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7. Objekterstellung mit Default-Konstruktoren
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Versuchen sie sich beim implementieren so kurz wie möglich zu halten. Ziel dieser Aufgabe ist es, das gelernte zu wiederholen und zu zeigen wie kompakt Groovy-Code im Vergleich zu Java-Code sein kann.
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#### Lösung:
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```Groovy
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class Person{
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def name
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def age
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def toString() {
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"${name}, Alter: ${age}"
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}
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}
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def personen = [new Person(name: "Alice", age: 20),
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new Person(name: "Bob", age: 18),
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new Person(name: "Charlie", age: 30),
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new Person(name: "David", age: 15),
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new Person(name: "Eve", age: 21)]
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personen.each{println it}
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def sum = 0
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for (i in 1..10) {
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sum += i
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}
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println("Summe der Zahlen von 1-10: ${sum}");
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```
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