我不想将日期格式化为 YYYY-MM-DD 或 dd/MM/YYYY。我问的是 LocalDate 的文字格式。
我刚刚开始学习 Java,正在使用这个名为 BlueJ 的 IDE。我想创建一个测试方法。
The screenshot will show what I am trying to do
现在,从构造函数中我们知道它需要一个 int、LocalDate 和一个 double。我在网上搜索了一下,发现
https://www.javabrahman.com/java-8/java-8-working-with-localdate-localtime-localdatetime-tutorial-with-examples/
java.time.LocalDate:LocalDate 实例保存没有时间的日期
区域,在 ISO-86011 日历系统中。 LocalDate具有默认格式
“YYYY-MM-DD”如“2016-12-12”。
所以我会在 testID 中输入一个正常数字 10001,而 double 则类似于 50.5
我还知道,为了注册一个字符串(如果需要的话),我需要将它括在“string”中
但我已经尝试了各种方法来输入日期,但我会留下一个错误
2018-05-30,30-05-2018,30/05/2018 会给我
Error: incompatible types: Int cannot be converted to java.time.LocalDate
另一方面,“30/05/2018”会给我
Error: Incompatible types: java.lang.String cannot be converted to java.time.LocalDate
如果我尝试 30.05.2018 它会说
Error: ';' expected
如果我尝试“2018-05-30”,它会说
Error: unclosed character literal
我已经没有办法尝试了。所以如果你能告诉我如何把它放在那里,那就太好了。
我真的需要知道 BlueJ 希望我如何输入它。因为网上BlueJ的资源非常稀少。
Code:
import java.time.LocalDate;
import java.util.ArrayList;
/**
* Write a description of class TestPaper here.
*
* @author (your name)
* @version (a version number or a date)
*/
public class TestPaper
{
// instance variables - replace the example below with your own
private int testID;
private LocalDate testDate;
private double testMarks;
private ArrayList<MCQ> MCQDetails;
/**
* Constructor for objects of class TestPaper
*/
public TestPaper(int testID, LocalDate testDate, double testMarks)
{
this.testID = testID;
this.testDate = testDate;
this.testMarks = testMarks;
MCQDetails = new ArrayList<MCQ>() ;
}
/**
* Accessor Method getTestID to get the testID
*
* @return int value of the choice ID
*/
public int getTestID(){
return testID;
}
/**
* Mutator Method to set the testID
*
* @param int format of the testID to set
*/
public void setTestID(int testID){
this.testID = testID;
}
/**
* Accessor Method getTestMarks to get the Test Marks
*
* @return double value of the test marks
*/
public double getTestMarks(){
return testMarks;
}
/**
* Mutator Method to set the testMarks
*
* @param String format of the choice Description to be set
*/
public void setTestMarks(double testMarks){
this.testMarks = testMarks;
}
/**
* Accessor Method getTestDate to get the testDate
*
* @return LocalDate value of the testDate
*/
public LocalDate getTestDate(){
return testDate;
}
/**
* Mutator Method to set the testDate
*
* @param LocalDate format of the testDate to set
*/
public void setTestDate(LocalDate testDate){
this.testDate = testDate;
}
/**
* Method addMCQ will allow users to add a MCQ Object to the list of MCQ
*
* @param addMCQ a MCQ Object
* @return boolean will return true if it is successfully added or false if not
*/
public boolean addMCQ(MCQ MCQName)
{
return MCQDetails.add(MCQName);
}
/**
* Method removeMCQ to remove an MCQ object from the Arraylist
*
* @param MCQName A parameter of type MCQ
*/
public void removeMCQ(MCQ MCQName)
{
MCQDetails.remove(MCQName);
}
/**
* Method listMCQ to return a list of MCQ arraylist
*
* @return The return value of MCQDetails (MCQ Arraylist)
*/
public ArrayList<MCQ> listMCQ()
{
return MCQDetails;
}
public MCQ findMCQ(int MCQID)
{
for(MCQ m : MCQDetails)
{
if(m.getQuestionID() == MCQID)
{
return m;
}
}
return null;
}