Selected switch with stop location in midst.
选择开关，中间带停止档位。
Switch to the J2EE perspective if it is not already selected.
如果还没选择，转换到J2EE透视图。
When the control is selected for the first time after you switch from Source view.
在从“源”视图切换到“设计”视图后第一次选择控件时。
When the control is selected for the first time after you switch from Source view.
在从“源”视图切换到“设计”视图后第一次选择控件时。
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