- 相關推薦
java運行常見異常舉例
下面小編為大家總結了幾個JAVA中常見的RuntimeException,希望對你們有所幫助:
NullPointerException:空指針異常類
示例1:
package com.darkmi.basic;
public class Test {
public static void main(String[] args) {
System.out.println(toUpper(null));
}
public static String toUpper(String str){
return str.toUpperCase();
}
}
異常信息如下:Exception in thread “main” java.lang.NullPointerException
at com.darkmi.basic.Test.toUpper(Test.java:11)
at com.darkmi.basic.Test.main(Test.java:6)
ArrayIndexOutOfBoundsException:數(shù)組下標越界異常
示例2:
package com.darkmi.basic;
public class Test {
public static void main(String[] args) {
int[] a = {0,1,2,3};
System.out.println(a[4]);
}
}
異常信息如下:
Exception in thread “main” java.lang.ArrayIndexOutOfBoundsException: 4
at com.darkmi.basic.Test.main(Test.java:7)
ArithmeticExecption:算術異常類:
示例3:
package com.darkmi.basic;
public class Test {
public static void main(String[] args) {
int a = 10 / 0;
System.out.println(a);
}
}
異常信息如下:
Exception in thread “main” java.lang.ArithmeticException: / by zero
at com.darkmi.basic.Test.main(Test.java:6)
ClassCastException:類型強制轉(zhuǎn)換異常
示例4:
package com.darkmi.basic;
public class Test {
public static void main(String[] args) {
testParse(“aaa”);
}
public static void testParse(Object str){
Integer i = (Integer)str;
}
}
異常信息如下:
Exception in thread “main” java.lang.ClassCastException: java.lang.String cannot be cast to java.lang.Integer
at com.darkmi.basic.Test.testParse(Test.java:10)
at com.darkmi.basic.Test.main(Test.java:6)
【java運行常見異常舉例】相關文章:
java運行常見異常類型07-11
汽車不必維修的10個常見異常07-16
Java中最常見的錯誤盤點05-28
Java編寫計算器的的常見做法07-08
航運行業(yè)常見船務公司簡稱與縮寫09-12
sun認證Java枚舉常見7種用法08-13
2017年java常見面試題及答案08-22
JAVA常見編碼問題解決方法10-24
ORACLE下開發(fā)JAVA程序常見問題解答09-30
Java與Java web的區(qū)別08-22