java I/O
Ref: cnblogs. com/ l anxuezaipiao/p/3371224.html
Java Base == & equals
Tags: Integer cache, == , equals This Blogger emphasizes that in actual development, developers should prioritize using .equals() to compare object values rather than simply relying on == to compare references. Java's Integer cache mechanism provides memory optimization for Java programs with values in the range of -128 to 127.However, values outside this range will result in the creation of new objects, resulting in unexpected results in == comparisons. public static void main(String[] args) { Integer a = 228; Integer b = 228; System.out.println(a == b); // false Integer x = 1; Integer y = 1; System.out.println(x == y); // true Integer c = 228; Integer d = 228; System.out.println(System.identityHash...
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