?? tree.java
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import java.awt.*;import java.util.Vector;class Tree { //variables Vector set; Node rep; //constructor public Tree( ) { set = new Vector(); } //methods public void Combine( Tree tree ) { int i; Edge change; for (i = 0; i < tree.Num_Items(); i++) { change = tree.Connect( i ); set.addElement( (Object)change ); } } public void Init( Node n ) { rep = n; } public void Add( Edge e ) { set.addElement( (Object)e ); rep = e.Rep(); } public Node Rep( ) { return rep; } public int Num_Items() { return set.size(); } public Edge Connect( int i) { return (Edge)set.elementAt(i); } public void Set_Rep( Node n ) { int i; Edge temp; rep = n; System.out.println("size of set = "+set.size()+", rep = "+rep.Get_ID()); for ( i = 0; i < set.size(); i++ ) { temp = (Edge)set.elementAt(i); temp.Set_Rep(n); System.out.println("from tree: start = "+(temp.From_Node()).Get_ID()+", rep = "+(temp.Rep()).Get_ID()); System.out.println("from tree: end = "+(temp.To_Node()).Get_ID()+", rep = "+(temp.Rep()).Get_ID()); } }}?? 快捷鍵說明
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