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java - 这个静态代码是如何工作的?

转载 作者:搜寻专家 更新时间:2023-10-30 19:39:53 25 4
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代码:

public static void main ( String[] args){
String a = new String("Hello");
String b = " pardner.";
System.out.println(a+b);
System.out.println("a.equals(\"Hello\") --> " + (a.equals("Hello")));
System.out.println("a --> " + a);
}

static {
try {
Field value = String.class.getDeclaredField("value");
value.setAccessible(true);
value.set("Hello", value.get("Howdy"));
} catch (Exception e) { }
}

结果:

Howdy pardner.
a.equals("Hello") --> true
a --> Howdy

此代码如何在打印时将“Hello”更改为“Howdy”?

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