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| public class Test07 { public static void main(String[] args) { WeddingCompany weddingCompany = new WeddingCompany(new You()); weddingCompany.happyMarry(); } }
interface Marry { void happyMarry(); }
class You implements Marry { @Override public void happyMarry() { System.out.println("要结婚了"); } }
class WeddingCompany implements Marry { private final Marry target;
public WeddingCompany(Marry target) { this.target = target; }
@Override public void happyMarry() { before(); this.target.happyMarry(); after(); } private void before() { System.out.println("before"); }
private void after() { System.out.println("after"); } }
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