填充数组后忽略其他参数java

Question

编码：//takes in the parameters by int and string and builds an arraypublic void setParameter(int newParameterNum, String newParameterName) {    this.parameterNum = newParameterNum;    this.parameterName = newParameterName;    this.parameterList = new String[numParameters];    this.parameterList[parameterNum] = parameterName;    for (int i = 0; i < numParameters; i++) {         this.countParameter += i;    }}主要代码（不可编辑）：//Add the needed parameters, Report should make sure I am not trying to break it    report1.setParameter(0, "01/01/1970");    report1.setParameter(1, "01/01/2018");    report1.setParameter(2, "pjdt");错误：run: Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 2   atweek6project.Report.setParameter(Report.java:134) at week6project.Week6Project.main(Week6Project.java:34) C:\Users\nicho\AppData\Local\NetBeans\Cache\8.2\executor-snippets\run.xml： 53：Java 返回：1 BUILD FAILED（总时间：0 秒）那么，如何忽略我不想添加到数组中的参数？如果请求的参数数量少于传递的参数。即它要求2 parameters但3在这种情况下通过。The numParameters is updated through this method:public void setNumParameters(int newNumParameters) {    this.numParameters = newNumParameters;}设置的主要方法： //Set the number of parameters for each report    report1.setNumParameters(2);    report2.setNumParameters(4);

Answer 1

你得到的错误java.lang.ArrayIndexOutOfBoundsException，当您尝试访问数组元素index>= array.length。

在下面的代码行中，确保 0 <= parameterNum < numParameters

this.parameterList[parameterNum] = parameterName;