摘要： <UIPickerViewDelegate>返回UIPickerView中Component列的宽度- (CGFloat)pickerView:(UIPickerView *)pickerView widthForComponent:(NSInteger)component;返回UIPickerView中Component列中每行的高度- (CGFloat)pickerView:(UIPickerView *)pickerView rowHeightForComponent:(NSInteger)component;当选择某一项Component列中的row行时的回调函数- (vo 阅读全文

摘要： import java.util.concurrent.TimeUnit;import javax.swing.JFrame; import javax.swing.JLabel;public class Ex_1 {public static void main(String[] args) throws Exception { JFrame frame = new JFrame("Hello Swing"); JLabel label = new JLabel("A Label"); frame.add(label); frame.setDefaul 阅读全文