syntaxtreenode.java

一些基本的编译文法的描述 基于java的

/**
 *
 * @author zhaowei
 */
public class SyntaxTreeNode {
    private String value;
    private SyntaxTreeNode child;
    private SyntaxTreeNode sibling;
    public SyntaxTreeNode() {
        this.value = "";
        this.child = null;
        this.sibling = null;
    }
    public SyntaxTreeNode(String value,SyntaxTreeNode child,SyntaxTreeNode sibling) {
        this.value = value;
        this.child = child;
        this.sibling = sibling;
    }
    public String getValue() {
        return this.value;
    }
    public SyntaxTreeNode getChild() {
        return this.child;
    }
    public SyntaxTreeNode getSibling() {
        return this.sibling;
    }
    public void setValue(String value) {
        this.value = value;
    }
    public void setChild(SyntaxTreeNode child) {
        this.child = child;
    }
    public void setSibling(SyntaxTreeNode sibling) {
        this.sibling = sibling;
    }
    public SyntaxTreeNode getLastSibling() {
        SyntaxTreeNode stn = this;
        if(stn!=null) {
            while(stn.getSibling()!=null) {
                stn = stn.getSibling();
            }
        }
        return stn;
    }
}