修正一下:
String todo="refresh";
int dMode=3;
String buffering=null;if (todo == null)
{System.out.println("todo==null");}
else if ( (dMode == 3) && (buffering == null) )
{System.out.println((dMode == 3));}
else
{System.out.println((dMode == 3)+"else");
System.out.println("else");}
String todo="refresh";
int dMode=3;
String buffering=null;if (todo == null)
{System.out.println("todo==null");}
else if ( (dMode == 3) && (buffering == null) )
{System.out.println((dMode == 3));}
else
{System.out.println((dMode == 3)+"else");
System.out.println("else");}
应该是
trueelseelse
吧?
{System.out.println("todo==null");}//因为todo != null,所以不执行这句,程序继续运行
else if ( (dMode == 3) && (buffering == null) )//条件成立执行括号内的语句
^-----这里如果改为4,那么将执行else里的语句
{System.out.println((dMode == 3));}//因为dMode为3,输出true。且后面的不执行。else//如果前两个条件都不成立,那么执行括号内的语句{System.out.println((dMode == 3)+"else");//dMode为3,所以输出true,整句为trueelse
System.out.println("else");}//换行输出else