使用Java语言编写的一款用于反映颜色变化的面板，也就是大家熟悉的颜色调色板演示程序。原理是初始化颜色选择按钮，然后为颜色选择按钮增加事件处理事件，最后实例化颜色选择器。-Use a Java language is used to reflect the change in color of the panel, which is the familiar color palette demo program. The principle is to initialize the color selection button, and then add the event handler event, the last instance of the color picker for color selection button.