不经意间刷到一篇字符串常量池博文，看完后发现存在不少错误，兴趣一来顺便又去搜了几篇，发现都大同小异，或多或少都有些问题，所以Bug君吹掉了键盘上的灰，拾掇拾掇就来了！

其实要彻底搞懂字符串常量池底层原理，只需要搞懂我精心设置的12道题即可，废话不多说，直接上题！关卡12道，欢迎冲关，如果冲关成功，那恭喜道友，你已至字符串常量池陆地神仙境。

【提示】为了码友们保持一致，请基于JDK1.7+完成冲关！

// 1public static void main(String[] args) {    String s1 = "Bug";    String s2 = "B" + "ug";    System.out.println(s1 == s2);    System.out.println(s2 == s2.intern());}

// 2public static void main(String[] args) {    String s1 = "Bug";    String s2 = new String("Bug");    System.out.println(s1 == s2);    System.out.println(s2 == s2.intern());}

// 3public static void main(String[] args) {    String s1 = new String("Bug");    String s2 = new String("Bug");    System.out.println(s1 == s2);    System.out.println(s2 == s2.intern());}

// 4public static void main(String[] args) {    String s1 = "B";    String s2 = s1 + "ug";    System.out.println(s2 == s2.intern());}

// 5public static void main(String[] args) {    String s1 = "i";    String s2 = s1 + "nt";    System.out.println(s2 == s2.intern());}

// 6public static void main(String[] args) {    final String s1 = "B";    String s2 = s1 + "ug";    System.out.println(s2 == s2.intern());}

// 7public static void main(String[] args) {    String s0 = "Bug";    String s1 = "B";    String s2 = s1 + "ug";    System.out.println(s0 == s2);    System.out.println(s2 == s2.intern());}

// 8public static void main(String[] args) {    String s0 = "Bug";    final String s1 = "B";    String s2 = s1 + "ug";    System.out.println(s0 == s2);    System.out.println(s2 == s2.intern());}

// 9public static void main(String[] args) {    String s1 = "B";    String s2 = "ug";    String s3 = s1 + s2;    System.out.println(s3 == s3.intern());}

// 10public static void main(String[] args) {    String s0 = "Bug";    String s1 = "B";    String s2 = "ug";    String s3 = s1 + s2;    System.out.println(s3 == s3.intern());}

// 11public static void main(String[] args) {    final String s1 = "B";    final String s2 = "ug";    String s3 = s1 + s2;    System.out.println(s3 == s3.intern());}

// 12public static void main(String[] args) {    String s0 = "Bug";    final String s1 = "B";    final String s2 = "ug";    String s3 = s1 + s2;    System.out.println(s3 == s3.intern());}

有不确定的答案一定要打开你的IDE亲自验证一下哦！这样印象会更深刻，相信你一定会发现新大陆！所以，答案和全面解析我们下期见！