dataelement.java

来自「最短路径和哈密顿通路」· Java 代码 · 共 8 行

import java.util.*;
public abstract class DataElement {
	public abstract boolean equals(DataElement otherElement);
	public abstract int compareTo(DataElement otherElement);
	public abstract void makeCopy(DataElement otherElement);
	public abstract DataElement getCopy();
}