我在我的网络应用程序中使用谷歌api的线图.在该折线图中我不想要x轴线和y轴线,但我不能很好地如何删除除图形之外的线.请你帮助我好吗.我用这个例子来练习
<script type="text/javascript">
google.load("visualization", "1", {packages:["corechart"]});
google.setOnLoadCallback(drawChart);
function drawChart() {
var data = google.visualization.arrayToDataTable([
['Year', 'Sales', 'Expenses'],
['2004', 1000, 400],
['2005', 1170, 460],
['2006', 660, 1120],
['2007', 1030, 540]
]);
var options = {
title: 'Company Performance'
};
var chart = new google.visualization.LineChart(document.getElementById('chart_div'));
chart.draw(data, options);
}
</script>
Run Code Online (Sandbox Code Playgroud) 在重载概念中,我有一个疑问,就是这样.当我使用int值重载方法时,方法调用的是float参数方法,而不是double参数方法.
void method1(float f){
System.out.println('float');
}
void method1(double f){
System.out.println('double');
}
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方法调用:
method1(10);
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输出:浮动
如此链接中的java教程中所述, 浮点字面值的类型为float,如果它以字母F或f结尾; 否则它的类型是双倍的,它可以选择以字母D或d结尾.
对于上面的情况,方法调用应该调用double参数方法.但它调用了float参数方法.
如何在这个区域发生超载过程?
我正在使用Struts 2.3.14作为我的应用程序...我需要在我的应用程序中进行一些单元测试...所以我使用的是junit4 ...但是当我ActionProxy在我的测试中使用时,它会显示NullPointerException...
我的测试代码是:
ActionProxy proxy=getActionProxy("/customize/saveRewards");
SaveRewardsPlus rewards=(SaveRewardsPlus)proxy.getAction();
request.setParameter("list[0].img_id", "1");
request.setParameter("list[0].tag", "Test Tag");
request.setParameter("list[0].desc", "Test Desc");
String result=proxy.execute();
assertEquals("success", result);
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我的行动班是:
private List<RewardsBean> list;
public String execute() {
try {
Class.forName(DRIVER);
con = DriverManager.getConnection(CONSTR, USER, PWD);
for (RewardsBean rb : list) {
sql = "update rewards set tag=?,description=? where img_id=?";
PreparedStatement ps = con.prepareStatement(sql);
ps.setString(1, rb.getTag());
ps.setString(2, rb.getDesc());
ps.setInt(3, rb.getImg_id());
ps.executeUpdate();
}
} catch (SQLException e) {
e.printStackTrace();
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
return …Run Code Online (Sandbox Code Playgroud) 我正在使用Apache Tomcat 7.当我使用安全管理器运行Tomcat并使用-Djava.security.debug参数时,我在控制台中获得了大量文本.我无法在控制台中阅读文本.所以我需要将控制台登录到某个文件中.我怎样才能做到这一点?
我使用jfree图表为我的应用程序.我需要图表看起来像这样
预期

但我已经很多方式格式化图表,但我只有这样.
实际

请帮我看一下预期的图表.我需要一个没有x轴线的图表.
我的图表代码是
final JFreeChart chart = ChartFactory.createLineChart(
"", // chart title
"", // domain axis label
"", // range axis label
dataset, // data
PlotOrientation.VERTICAL, // orientation
false, // include legend
false, // tooltips
false // urls
);
final CategoryPlot plot = chart.getCategoryPlot();
ValueAxis range = plot.getRangeAxis();
range.setVisible(false);
plot.setBackgroundPaint(Color.WHITE);
plot.setRangeZeroBaselinePaint(Color.RED);
plot.setOutlineVisible(false);
chart.setBackgroundPaint(Color.WHITE);
final LineAndShapeRenderer renderer = (LineAndShapeRenderer) plot.getRenderer();
renderer.setItemLabelsVisible(false);
renderer.setBaseShapesVisible(true);
renderer.setBaseShapesFilled(true);
plot.setRangeGridlinePaint(Color.white);
renderer.setSeriesStroke(0, new BasicStroke(2.0f));
plot.setDomainGridlinePaint(Color.BLUE);
NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis();
rangeAxis.setVisible(false);
rangeAxis.setLabelPaint(Color.BLUE);
Shape circle = …Run Code Online (Sandbox Code Playgroud) 使用名称创建bean时出错
'org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor#0' defined in URL [file:/E:/source-files-healthentic/securityadmin/build/test/classes/applicationContext.xml]: Initialization of bean failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in URL [file:/E:/source-files-healthentic/securityadmin/build/test/classes/applicationContext.xml]: Invocation of init method failed; nested exception is java.lang.IllegalStateException: Must start with Java agent to use InstrumentationLoadTimeWeaver. See Spring documentation.
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor#0' defined in URL [file:/E:/source-files-healthentic/securityadmin/build/test/classes/applicationContext.xml]: Initialization of bean failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in URL [file:/E:/source-files-healthentic/securityadmin/build/test/classes/applicationContext.xml]: Invocation of init method failed; nested exception …Run Code Online (Sandbox Code Playgroud) 我只是感到困惑,并没有明确的想法,为什么java被称为编程语言,也是一个平台.我在oracle的公司网站上提到过:
Java technology is both a programming language and a platform
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但我的问题没有答案.
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