java - 将声明的字符串转换为数组

Question

在我的程序中，用户声明了一串数字，我试图将其转换为数组。
例子：

WeeklyFiber week2 = new WeeklyFiber("CS4567", "11/24/13", 32, "27, 26, 28");

我试图弄清楚如何将该字符串添加到我的类实例变量中。
这就是我所拥有的：

   private String sampleID;
   private String weekOfTest;
   private int engineerID;
   private String[] strengths = new String[20];
   private static int count; 

  public WeeklyFiber(String sampleID, String weekOfTest, int engineerID, String strengths) 
   {
      this.sampleID = sampleID;
      this.weekOfTest = weekOfTest;
      this.engineerID = engineerID;
      this.strengths = strengths;
      count++;
   }

我的编译错误消息说类型不兼容，需要：String[]，找到：String

Answer 1

这是因为您已声明 String[]strengths 是一个数组。

像这样声明你的构造函数：

public WeeklyFiber(String sampleID, String weekOfTest, int engineerID, String[] strengths) 
   {
      this.sampleID = sampleID;
      this.weekOfTest = weekOfTest;
      this.engineerID = engineerID;
      this.strengths = strengths;
      count++;
   }

拨打电话：

WeeklyFiber week2 = new WeeklyFiber("CS4567", "11/24/13", 32, new String[] {"27","26", "28"});

Answer 2

像这样传递它：

WeeklyFiber week2 = new WeeklyFiber("CS4567", "11/24/13", 32, 
                          new String[] { "27", "26", "28" });

Answer 3

您需要将Stringnumbers 解析为多个Strings。例如，

this.strengths = strengths.split(",");

Answer 4

你不能说this.strengths = strengths是因为strengths参数是 typeString而不是String[]。那就是您的错误的来源。