import sun.jvm.hotspot.ui.tree.CTypeTreeNodeAdapter; //导入依赖的package包/类
public void doit(Tokens t) {
    if (t.countTokens() != 2) {
        usage();
    } else {
        Type type = agent.getTypeDataBase().lookupType(t.nextToken());
        Address a = VM.getVM().getDebugger().parseAddress(t.nextToken());
        CTypeTreeNodeAdapter node = new CTypeTreeNodeAdapter(a, type, null);

        out.println("pointer to " + type + " @ " + a +
                    " (size = " + type.getSize() + ")");
        printNode(node);
    }
}