Java IllegalArgumentException,其中';我的代码中有什么错误?
嗯,我找不到错误:Java IllegalArgumentException,其中';我的代码中有什么错误?,java,Java,嗯,我找不到错误: package udemy; public class ClassOne { private int positiveNum; public ClassOne (int positiveNum){ if (positiveNum< 0 ){ throw new IllegalArgumentException("positiveNum should be greater than 0"); } this.positiv
package udemy;
public class ClassOne {
private int positiveNum;
public ClassOne (int positiveNum){
if (positiveNum< 0 ){
throw new IllegalArgumentException("positiveNum should be greater than 0");
}
this.positiveNum= positiveNum;
}
public int getNum(){
return positiveNum;
}
}
但我得到以下输出:
Exception in thread "main" java.lang.IllegalArgumentException:positiveNum should be greater than 0
at udemy.ClassOne.<init>(ClassOne.java:11)
at udemy.ClassTwo.main(ClassTwo.java:7)
线程“main”java.lang.IllegalArgumentException中的异常:PositionEnum应大于0
在udemy.ClassOne.(ClassOne.java:11)
在udemy.ClassTwo.main(ClassTwo.java:7)
而不是说这个数字应该大于0。
错误在哪里?这不是问题。未捕获异常的标准显示为: 或 如果希望具有与此不同的外观,则必须在try块中捕获异常
这是说它应该大于0 线程“main”java.lang.IllegalArgumentException中的异常:udemy.ClassOne处的positiveEnum应大于0(ClassOne.java:11)udemy.ClassTwo.main(ClassTwo.java:7) 但真正的问题是您应该在try块中创建值,如下所示:
package udemy;
public class ClassTwo {
public static void main (String[] args) {
try {
ClassOne number= new ClassOne(-15);
System.out.printf("%s%n",budala.getNum());
}
catch(IllegalArgumentException e)
{
System.out.printf("%s",e.getMessage());
}
}
}
Exception in thread "main" java.lang.IllegalArgumentException:positiveNum should be greater than 0 at udemy.ClassOne.(ClassOne.java:11) at udemy.ClassTwo.main(ClassTwo.java:7)
Exception in thread "threadName" ExceptionType:message
at StackTraceElement
at StackTraceElement
...
//...
try {
ClassOne number= new ClassOne(-15);
System.out.printf("%s%n",budala.getNum());
}
catch(IllegalArgumentException e)
{
System.out.printf("%s",e.getMessage());
}
// ...
package udemy;
public class ClassTwo {
public static void main (String[] args) {
try {
ClassOne number= new ClassOne(-15);
System.out.printf("%s%n",budala.getNum());
}
catch(IllegalArgumentException e)
{
System.out.printf("%s",e.getMessage());
}
}
}