下面小编为大家总结了几个JAVA中常见的RuntimeException,希望对你们有所帮助:
NullPointerException:空指针异常类
示例1:
package c;
public class Test {
public static void main(String[] args) {
tln(toUpper(null));
}
public static String toUpper(String str){
return perCase();
}
}
异常信息如下:Exception in thread “main” PointerException
at per(:11)
at (:6)
ArrayIndexOutOfBoundsException:数组下标越界异常
示例2:
package c;
public class Test {
public static void main(String[] args) {
int[] a = {0,1,2,3};
tln(a[4]);
}
}
异常信息如下:
Exception in thread “main” yIndexOutOfBoundsException: 4
at (:7)
ArithmeticExecption:算术异常类:
示例3:
package c;
public class Test {
public static void main(String[] args) {
int a = 10 / 0;
tln(a);
}
}
异常信息如下:
Exception in thread “main” hmeticException: / by zero
at (:6)
ClassCastException:类型强制转换异常
示例4:
package c;
public class Test {
public static void main(String[] args) {
testParse(“aaa”);
}
public static void testParse(Object str){
Integer i = (Integer)str;
}
}
异常信息如下:
Exception in thread “main” sCastException: ng cannot be cast to ger
at Parse(:10)
at (:6)