jdk源码添加到eclipse及NumberFormatException源码

川长思鸟来 2023-10-05 17:41 48阅读 0赞

1.拷贝jdk源码，文件为安装jdk目录下的src.zip，解压文件

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2.eclipse新建java项目，把解析的文件粘贴到src目录下

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3.配置加载项目的jdk

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4.解读NumberFormatException异常源码

（1）写异常方法

public static void main( String[] args ) {
            try {
    			String str = "abc";
    			Integer.parseInt(str);
    		} catch (NumberFormatException e) {
    			e.printStackTrace();
    		}
    	}

（2）跟踪NumberFormatException代码

NumberFormatException类继承IllegalArgumentException类，具有带参数和不带参数的构造方法public NumberFormatException ()、 public NumberFormatException (String s) ，以及保存的提示方法

static NumberFormatException forInputString(String s) {
            return new NumberFormatException("For input string: \"" + s + "\"");
        }

IllegalArgumentException继承RuntimeException类，实现无参和带参的方法

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RuntimeException继承Exception，同样实现无参和带参的方法

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Exception继承Throwable，同样实现无参和带参的方法

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e.printStackTrace();方法调用

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