NumberFormatException(数字格式化异常)

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已于 2022-03-07 21:32:50 修改 · 5.2k 阅读

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#java #开发语言 #Integer

于 2022-03-07 21:32:36 首次发布

NumberFormatException(数字格式化异常)

public class Main {
    public static void main(String[] args) {
        
         String str1 = "123";
        String str2 = "12a";
        System.out.println(Integer.parseInt(str1));    //123
        System.out.println(Integer.parseInt(str2));    /*123
    Exception in thread "main" java.lang.NumberFormatException: For input string: "12a"
	at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
	at java.lang.Integer.parseInt(Integer.java:580)
	at java.lang.Integer.parseInt(Integer.java:615)
	at Main.main(Main.java:6)*/

    }
}

控制台输出：

123
Exception in thread "main" java.lang.NumberFormatException: For input string: "12a"
   at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
   at java.lang.Integer.parseInt(Integer.java:580)
   at java.lang.Int