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ClassInitDemo.java

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import sun.misc.Unsafe;

/**

* @author xjn

* @since 2020-03-02

*/

public class ClassInitDemo {

final String result;

private static final char value[] = new char[10];

private static ThreadLocal threadLocal;

public ClassInitDemo(String x, String y) {

this.result = add(x, y);

}

public String add(String x, String y) {

threadLocal.remove();

return x + y;

}

static class SubClass extends ClassInitDemo {

String z;

public SubClass(String x, String y, String z) {

super(x, y);

this.z = z;

}

public String add(String x, String y) {

return super.add(x, y) + z;

}

}

public static String appendStr(String s) {

s += "bbb";

System.out.println(s);

return s;

}

public static Integer test(Integer a) {

a += 1;

return a;

}

public static void main(String[] args)throws Exception {

// System.out.println(new SubClass("A", "B", "C").result);

// String s = new String("aaa");

// String ns = appendStr(s);

// System.out.println("s:" + s.toString());

Unsafe unsafe = Unsafe.getUnsafe();

Integer a = 1;

Integer test = test(a);

System.out.println("a:" + a);

System.out.println("test:" + test);

}

}