在JAVA中怎样禁用一个主面板（JFrame）
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public void setEnabled(boolean b)
Enables or disables this component, depending on the value of the parameter b. An enabled component can respond to user input and generate events. Components are enabled initially by default.
Note: Disabling a lightweight component does not prevent it from receiving MouseEvents.
Parameters:
b - If true, this component is enabled; otherwise this component is disabled
Enables or disables this component, depending on the value of the parameter b. An enabled component can respond to user input and generate events. Components are enabled initially by default.
Note: Disabling a lightweight component does not prevent it from receiving MouseEvents.
Parameters:
b - If true, this component is enabled; otherwise this component is disabled
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