java - Why does AbstractStringBuilder.append behave differently for MIN_VALUE? -

consider following methods in java.lang.abstractstringbuilder

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long

public abstractstringbuilder append(long l) {     if (l == long.min_value) {         append("-9223372036854775808");         return this;     }     int appendedlength = (l < 0) ? long.stringsize(-l) + 1                                  : long.stringsize(l);     int spaceneeded = count + appendedlength;     ensurecapacityinternal(spaceneeded);     long.getchars(l, spaceneeded, value);     count = spaceneeded;     return this; } 

integer

public abstractstringbuilder append(int i) {     if (i == integer.min_value) {         append("-2147483648");         return this;     }     int appendedlength = (i < 0) ? integer.stringsize(-i) + 1                                  : integer.stringsize(i);     int spaceneeded = count + appendedlength;     ensurecapacityinternal(spaceneeded);     integer.getchars(i, spaceneeded, value);     count = spaceneeded;     return this; } 

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why abstractstringbuilder#append use different algorithm append min_value ?

because integer.stringsize requires non-negative argument. code looks this:

final static int [] sizetable = { 9, 99, 999, 9999, 99999, 999999, 9999999,                                   99999999, 999999999, integer.max_value };  // requires positive x static int stringsize(int x) {     (int i=0; ; i++)         if (x <= sizetable[i])             return i+1; }