有个java 异常问题不解。。

Question

[code="java"]

public class ClassA {

public ClassA()throws Exception{
    // TODO Auto-generated constructor stub

    try{
        throw new  RuntimeException("bbbbbbbbbb");
    }catch(RuntimeException e){
        throw new Exception("cccccccc"+ e.getMessage(),e);
    }
}

}

[/code]

[code="java"]
public class CatchExceptionTest {

public static void main(String[] args){

    try{
        Class throttleClass = Class.forName("ClassA");
        Constructor c = throttleClass.getConstructor();
        ClassA a = (ClassA)c.newInstance();

    }catch(RuntimeException ee){
        System.out.println("11111111");
        System.out.println(ee.getMessage());
    }catch(Exception e){
        System.out.println("222222222 " + e.toString());
        System.out.println(e.getMessage());
    }
}

}

[/code]

求主方法执行的结果， 以及出现的原因。。。

Answer 1

[code="java"]

/**

• 自定义异常类

• */
  public class CustomException extends Exception {

  /** 自定义错误代码 */
  private String errorCode;

  public CustomException() {
  super();
  }

  public CustomException(String message, Throwable cause) {
  super(message, cause);
  }

  public CustomException(String message) {
  super(message);
  }

  public CustomException(Throwable cause) {
  super(cause);
  }

  /**

  • 添加一个自定义的code属性
  • @param errorCode
  • @param message
  • @param cause */ public CustomException(String errorCode, String message, Throwable cause) { super(message, cause); this.errorCode = errorCode; }

  public String getErrorCode() {
  return errorCode;
  }

  public void setErrorCode(String errorCode) {
  this.errorCode = errorCode;
  }

}

[/code]

// 构造异常
new CustomException("errorA", "异常A", e);
new CustomException("errorB", "异常B", e);

捕捉：
try {
....
} catch (CustomException ce) {
System.out.println(ce.getErrorCode());
}