intx2=200;inty2=50;g2d.drawLine(x1,y1,x2,y2);}publicstaticvoidmain(String[]args){JFrameframe=newJFrame("Line Drawing Example");frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);frame.setSize(400,400);LineDrawingExamplepanel=newLineDrawingExample();frame.add(panel);frame.setVisible(...
Example #1Source File: PoiPublicUtil.java From autopoi with Apache License 2.0 6 votes /** * 获取Excel2007图片 * * @param sheet * 当前sheet对象 * @param workbook * 工作簿对象 * @return Map key:图片单元格索引(1_1)String,value:图片流PictureData */ public static Map<String, Picture...
Java Inheritance Example Why does the following code display "New A New B"? class A { public A() { System.out.println("New A"); } } class B extends A { public B() { System.out.println("New B"); } } class Program { public static void main(String[ ] args) { B obj = new...
importjavax.swing.*;importjava.awt.*;publicclassSimplePaintExampleextendsJPanel{@OverrideprotectedvoidpaintComponent(Graphicsg){super.paintComponent(g);// 调用父类的方法// 设置颜色g.setColor(Color.BLUE);// 绘制圆形g.fillOval(50,50,100,100);// 设置字体g.setColor(Color.BLACK);g.setFont(newFont(...
我们可以往对象中添加一个 String 类型的 rowTips 字段,则可以直接拿到对应的错误信息。 比如,我们将表格中赵子龙的性别改为F(F并不是映射数据),将大乔的性别改为二十八(不能转换为Integer类型数据)。 Cotroller 代码略(和 1.2.2 完全一致)。 测试效果:可以看到,我们可以通过 rowTips 直接拿到对应的错误数据提示...
public class TemplateMethodExample { public static void main(String[] args) { AbstractClass template = new ConcreteClass(); template.templateMethod(); } } 15. 责任链模式(Chain of Responsibility) 问题: 在某些情况下,一个请求需要在多个对象之间传递,每个对象都可能处理该请求或将其传递给下一个...
(Graphicsg){super.paintComponent(g);g.setColor(Color.RED);g.fillRect(50,50,200,100);}publicstaticvoidmain(String[]args){JFrameframe=newJFrame("Drawing Example");frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);frame.setSize(300,200);frame.add(newDrawingExample());frame.setVisible(true)...
{ /** * 字段名称 */ String value(); /** * 导出排序先后: 数字越小越靠前(默认按Java类字段顺序导出) */ int sort() default 0; /** * 导出映射,格式如:0-未知;1-男;2-女 */ String kv() default ""; /** * 导出模板示例值(有值的话,直接取该值,不做映射) */ String example() ...
System.out.println("Drawing a circle"); } }classRectangleextendsShape {voiddraw() { System.out.println("Drawing a rectangle"); } }publicclassMain {publicstaticvoidmain(String[] args) { Circle circle=newCircle(); circle.draw(); circle.display(); ...
return drawing; } PERSISTENCE_ORDER_PART_DETAILalso has a column,SPECIFICATION, of typeCLOB.CLOBstands for character large objects, which are used to store string data too large to be stored in aVARCHARcolumn.SPECIFICATIONis mapped to the fieldPart.specificationof typejava.lang.String. The@Lobann...