Java 进度条的实现源码，通过本例你可以学习到如何设置进度条启动时可显示的字符串，设置进度条边框，将进度条加入内容窗格中，设置加载条的显示位置等知识技巧。-The progress of implementation of Java source code, through the example you can learn how to set the string to display the progress bar starts, set the progress bar border, the progress bar add content pane, set the loading bar display position knowledge skills.