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绀轰緥浠ｇ爜锛?/p>

abstract class AbstractClass {
// 鏅€氭柟娉?/span>
public void printMessage() {
System.out.println("This is a message.");
}
// 鎶借薄鏂规硶
public abstract void abstractMethod();
}

2. 鎶借薄鏂规硶鐨勫畾涔夛細浣跨敤abstract鍏抽敭瀛椾慨楗版柟娉曪紝灏嗗叾澹版槑涓烘娊璞℃柟娉曘€傛娊璞℃柟娉曟病鏈夊叿浣撶殑瀹炵幇锛屽彧鏈夋柟娉曠殑澹版槑锛岄渶瑕佸湪瀛愮被涓疄鐜般€?/li>

绀轰緥浠ｇ爜锛?/p>

abstract class AbstractClass {
// 鎶借薄鏂规硶
public abstract void abstractMethod();
}

3. 缁ф壙鎶借薄绫伙細鎶借薄绫讳笉鑳借瀹炰緥鍖栵紝鍙兘琚户鎵裤€傚瓙绫荤户鎵挎娊璞＄被鍚庯紝蹇呴』瀹炵幇鐖剁被涓殑鎵€鏈夋娊璞℃柟娉曪紝鍚﹀垯瀛愮被涔熷繀椤诲０鏄庝负鎶借薄绫汇€?/li>

绀轰緥浠ｇ爜锛?/p>

abstract class AbstractClass {
// 鎶借薄鏂规硶
public abstract void abstractMethod();
}
class SubClass extends AbstractClass {
// 瀹炵幇鐖剁被鐨勬娊璞℃柟娉?/span>
public void abstractMethod() {
System.out.println("This is the implementation of abstractMethod in SubClass.");
}
}

鎬荤粨锛歛bstract鍏抽敭瀛楃敤浜庡畾涔夋娊璞＄被鍜屾娊璞℃柟娉曪紝鎶借薄绫讳笉鑳借瀹炰緥鍖栵紝鍙兘琚户鎵裤€傛娊璞℃柟娉曟病鏈夊叿浣撶殑瀹炵幇锛岄渶瑕佸湪瀛愮被涓疄鐜般€?/p>