e1033. listening for selection events in a jtree component.txt

来自「这里面包含了一百多个JAVA源文件」· 文本 代码 · 共 19 行

This example adds a listener for selection events to a tree component. 
    
tree.addTreeSelectionListener(new TreeSelectionListener() {
        public void valueChanged(TreeSelectionEvent evt) {
            // Get all nodes whose selection status has changed
            TreePath[] paths = evt.getPaths();
    
            // Iterate through all affected nodes
            for (int i=0; i<paths.length; i++) {
                if (evt.isAddedPath(i)) {
                    // This node has been selected
                } else {
                    // This node has been deselected
                }
            }
        }
    });