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按照题目要求编写的用javaBean规范设计的学生类Student的Java程序如下
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需要创建user.java.test包,把Student.java文件和Test.java文件放入包中,编译Student.java文件并且编译运行Test.java文件得到运行结果
Student.java文件代码如下
package user.java.test;
import java.io.Serializable;
public class Student implements Serializable{
private static final long serialVersionUID = 1L;
private String no;
private String name;
private double score;
public Student(){}
public Student(String no,String name,double score){
this.no=no;
this.name=name;
this.score=score;
}
public String getNo(){ return no;}
public void setNo(String no){ this.no=no;}
public String getName(){ return name;}
public void setName(String name){ this.name=name;}
public double getScore(){ return score;}
public void setScore(double score){ this.score=score;}
public String toString(){
return "学号:"+no+",姓名:"+name+",成绩:"+score;
}
public static double getAvg(Student[] sArray){
double sum=0,avg;
for(int i=0;isArray.length;i++){
sum=sum+sArray[i].getScore();
}
avg=sum/sArray.length;
return avg;
}
}
Test.java文件代码如下
package user.java.test;
public class Test{
public static void main(String[] args){
Student[] sArray=new Student[5];
sArray[0]=new Student("001","张三",89.5);
sArray[1]=new Student("002","李四",82.5);
sArray[2]=new Student("003","王五",93);
sArray[3]=new Student("004","赵六",73.5);
sArray[4]=new Student("005","孙七",66);
System.out.println("这些学生的平均分:"+Student.getAvg(sArray));
for(int i=0;isArray.length;i++){
System.out.println(sArray[i].toString());
}
}
}
我有个JS的要么？
你可以把他改下我是没时间帮你该哈！！！
!--日期框选择--
var DS_x,DS_y;
function dateSelector() //构造dateSelector对象，用来实现一个日历形式的日期输入框。
{
var myDate=new Date();
this.year=myDate.getFullYear(); //定义year属性，年份，默认值为当前系统年份。
this.month=myDate.getMonth()+1; //定义month属性，月份，默认值为当前系统月份。
this.date=myDate.getDate(); //定义date属性，日，默认值为当前系统的日。
this.inputName=''; //定义inputName属性，即输入框的name，默认值为空。注意：在同一页中出现多个日期输入框，不能有重复的name！
this.display=display; //定义display方法，用来显示日期输入框。
}
function display() //定义dateSelector的display方法，它将实现一个日历形式的日期选择框。
{
var week=new Array('日','一','二','三','四','五','六');
document.write("style type=text/css");
document.write(" .ds_font td,span { font: normal 12px 宋体; color: #000000; }");
document.write(" .ds_border { border: 1px solid #000000; cursor: hand; background-color: #DDDDDD }");
document.write(" .ds_border2 { border: 1px solid #000000; cursor: hand; background-color: #DDDDDD }");
document.write("/style");
var M=new String(this.month);
var d=new String(this.date);
if(M.length==1d.length==1){
document.write("input style='text-align:center;' id='DS_"+this.inputName+"' name='"+this.inputName+"' value='"+this.year+"-0"+this.month+"-0"+this.date+"' title=双击可进行编缉 ondblclick='this.readOnly=false;this.focus()' onblur='this.readOnly=true' readonly");}
else if(M.length==1d.length==2){
document.write("input style='text-align:center;' id='DS_"+this.inputName+"' name='"+this.inputName+"' value='"+this.year+"-0"+this.month+"-"+this.date+"' title=双击可进行编缉 ondblclick='this.readOnly=false;this.focus()' onblur='this.readOnly=true' readonly");}
else if(M.length==2d.length==1){
document.write("input style='text-align:center;' id='DS_"+this.inputName+"' name='"+this.inputName+"' value='"+this.year+"-"+this.month+"-0"+this.date+"' title=双击可进行编缉 ondblclick='this.readOnly=false;this.focus()' onblur='this.readOnly=true' readonly");}
else if(M.length==2d.length==2){
document.write("input style='text-align:center;' id='DS_"+this.inputName+"' name='"+this.inputName+"' value='"+this.year+"-"+this.month+"-"+this.date+"' title=双击可进行编缉 ondblclick='this.readOnly=false;this.focus()' onblur='this.readOnly=true' readonly");}
document.write("button style='width:60px;height:18px;font-size:12px;margin:1px;border:1px solid #A4B3C8;background-color:#DFE7EF;' type=button onclick=this.nextSibling.style.display='block' onfocus=this.blur()日期/button");
document.write("div style='position:absolute;display:none;text-align:center;width:0px;height:0px;overflow:visible' onselectstart='return false;'");
document.write(" div style='position:absolute;left:-60px;top:20px;width:142px;height:165px;background-color:#F6F6F6;border:1px solid #245B7D;' class=ds_font");
document.write(" table cellpadding=0 cellspacing=1 width=140 height=20 bgcolor=#CEDAE7 onmousedown='DS_x=event.x-parentNode.style.pixelLeft;DS_y=event.y-parentNode.style.pixelTop;setCapture();' onmouseup='releaseCapture();' onmousemove='dsMove(this.parentNode)' style='cursor:move;'");
document.write(" tr align=center");
document.write(" td width=12% onmouseover=this.className='ds_border' onmouseout=this.className='' onclick=subYear(this) title='减小年份'/td");
document.write(" td width=12% onmouseover=this.className='ds_border' onmouseout=this.className='' onclick=subMonth(this) title='减小月份'/td");
document.write(" td width=52%b"+this.year+"/bb年/bb"+this.month+"/bb月/b/td");
document.write(" td width=12% onmouseover=this.className='ds_border' onmouseout=this.className='' onclick=addMonth(this) title='增加月份'/td");
document.write(" td width=12% onmouseover=this.className='ds_border' onmouseout=this.className='' onclick=addYear(this) title='增加年份'/td");
document.write(" /tr");
document.write(" /table");
document.write(" table cellpadding=0 cellspacing=0 width=140 height=20 onmousedown='DS_x=event.x-parentNode.style.pixelLeft;DS_y=event.y-parentNode.style.pixelTop;setCapture();' onmouseup='releaseCapture();' onmousemove='dsMove(this.parentNode)' style='cursor:move;'");
document.write(" tr align=center");
for(i=0;i7;i++)
document.write(" td"+week[i]+"/td");
document.write(" /tr");
document.write(" /table");
document.write(" table cellpadding=0 cellspacing=2 width=140 bgcolor=#EEEEEE");
for(i=0;i6;i++)
{
document.write(" tr align=center");
for(j=0;j7;j++)
document.write(" td width=10% height=16 onmouseover=if(this.innerText!=''this.className!='ds_border2')this.className='ds_border' onmouseout=if(this.className!='ds_border2')this.className='' onclick=getValue(this,document.all('DS_"+this.inputName+"'))/td");
document.write(" /tr");
}
document.write(" /table");
document.write(" span style=cursor:hand onclick=this.parentNode.parentNode.style.display='none'【关闭】/span");
document.write(" /div");
document.write("/div");
dateShow(document.all("DS_"+this.inputName).nextSibling.nextSibling.childNodes[0].childNodes[2],this.year,this.month)
}
function subYear(obj) //减小年份
{
var myObj=obj.parentNode.parentNode.parentNode.cells[2].childNodes;
myObj[0].innerHTML=eval(myObj[0].innerHTML)-1;
dateShow(obj.parentNode.parentNode.parentNode.nextSibling.nextSibling,eval(myObj[0].innerHTML),eval(myObj[2].innerHTML))
}
function addYear(obj) //增加年份
{
var myObj=obj.parentNode.parentNode.parentNode.cells[2].childNodes;
myObj[0].innerHTML=eval(myObj[0].innerHTML)+1;
dateShow(obj.parentNode.parentNode.parentNode.nextSibling.nextSibling,eval(myObj[0].innerHTML),eval(myObj[2].innerHTML))
}
function subMonth(obj) //减小月份
{
var myObj=obj.parentNode.parentNode.parentNode.cells[2].childNodes;
var month=eval(myObj[2].innerHTML)-1;
if(month==0)
{
month=12;
subYear(obj);
}
myObj[2].innerHTML=month;
dateShow(obj.parentNode.parentNode.parentNode.nextSibling.nextSibling,eval(myObj[0].innerHTML),eval(myObj[2].innerHTML))
}
function addMonth(obj) //增加月份
{
var myObj=obj.parentNode.parentNode.parentNode.cells[2].childNodes;
var month=eval(myObj[2].innerHTML)+1;
if(month==13)
{
month=1;
addYear(obj);
}
myObj[2].innerHTML=month;
dateShow(obj.parentNode.parentNode.parentNode.nextSibling.nextSibling,eval(myObj[0].innerHTML),eval(myObj[2].innerHTML))
}
function dateShow(obj,year,month) //显示各月份的日
{
var myDate=new Date(year,month-1,1);
var today=new Date();
var day=myDate.getDay();
var selectDate=obj.parentNode.parentNode.previousSibling.previousSibling.value.split('-');
var length;
switch(month)
{
case 1:
case 3:
case 5:
case 7:
case 8:
case 10:
case 12:
length=31;
break;
case 4:
case 6:
case 9:
case 11:
length=30;
break;
case 2:
if((year%4==0)(year%100!=0)||(year%400==0))
length=29;
else
length=28;
}
for(i=0;iobj.cells.length;i++)
{
obj.cells[i].innerHTML='';
obj.cells[i].style.color='';
obj.cells[i].className='';
}
for(i=0;ilength;i++)
{
obj.cells[i+day].innerHTML=(i+1);
if(year==today.getFullYear()(month-1)==today.getMonth()(i+1)==today.getDate())
obj.cells[i+day].style.color='red';
if(year==eval(selectDate[0])month==eval(selectDate[1])(i+1)==eval(selectDate[2]))
obj.cells[i+day].className='ds_border2';
}
}
function getValue(obj,inputObj) //把选择的日期传给输入框
{
var myObj=inputObj.nextSibling.nextSibling.childNodes[0].childNodes[0].cells[2].childNodes;
if(obj.innerHTML)
if(obj.innerHTML.length==1myObj[2].innerHTML.length==1)
inputObj.value=myObj[0].innerHTML+"-0"+myObj[2].innerHTML+"-0"+obj.innerHTML;
else if(obj.innerHTML.length==1myObj[2].innerHTML.length==2)
inputObj.value=myObj[0].innerHTML+"-"+myObj[2].innerHTML+"-0"+obj.innerHTML;
else if(obj.innerHTML.length==2myObj[2].innerHTML.length==1)
inputObj.value=myObj[0].innerHTML+"-0"+myObj[2].innerHTML+"-"+obj.innerHTML;
else if(obj.innerHTML.length==2myObj[2].innerHTML.length==2)
inputObj.value=myObj[0].innerHTML+"-"+myObj[2].innerHTML+"-"+obj.innerHTML;
inputObj.nextSibling.nextSibling.style.display='none';
for(i=0;iobj.parentNode.parentNode.parentNode.cells.length;i++)
obj.parentNode.parentNode.parentNode.cells[i].className='';
obj.className='ds_border2'
}
function dsMove(obj) //实现层的拖移
{
if(event.button==1)
{
var X=obj.clientLeft;
var Y=obj.clientTop;
obj.style.pixelLeft=X+(event.x-DS_x);
obj.style.pixelTop=Y+(event.y-DS_y);
}
}
/***调用代码**
script language=javascript
var myDate=new dateSelector();
myDate.year=1900;//morenqiri
myDate.inputName='date'; //
myDate.display();
/script
*/
仅仅是给窗口添加背景的话是很简单的，添加上以下语句（自己去添加变量哈）：\x0d\x0a\x0d\x0alabel = new JLabel(background); //background为ImageIcon\x0d\x0a// 把标签的大小位置设置为图片刚好填充整个面板 \x0d\x0alabel.setBounds(0, 0, this.getWidth(), this.getHeight());\x0d\x0a//添加图片到frame的第二层(把背景图片添加到分层窗格的最底层作为背景)\x0d\x0athis.getLayeredPane().add(label,new Integer(Integer.MIN_VALUE));\x0d\x0a//把内容窗格转化为JPanel，否则不能用方法setOpaque()来使内容窗格透明\x0d\x0ajPanel=(JPanel)this.getContentPane();\x0d\x0a//设置透明\x0d\x0ajPanel.setOpaque(false);\x0d\x0a\x0d\x0a然后你上面那个JPanel p也设置成透明就可以了