设有如下代码段
1Strings=null;
2if(s!=null
1Strings=null;
2if(s!=null
举一反三
- 设有如下代码段1Strings=null;2if(s!=null&s.length()>0)3System.out.println("s!=null&s.length()>0"); A: 6,8 B: 2,4,6,8 C: 2,6,8 D: 2,4
- 设有如下代码段 1 String s = null 2 if ( s != null
- 设有如下代码段 1 String s = null; 2 if ( s != null & s.length() > 0) 3 System.out.println("s != null & s.length() > 0"); 4 if ( s != null && s.length() > 0) 5 System.out.println("s != null & s.length() > 0"); 6 if ( s != null || s.length() > 0) 7 System.out.
- 设有如下代码段1Strings=null;2if(s!=nulls.length()0)3System.out.println(s!=nulls.length()0);4if(s!=nulls.length()0)5System.out.println(s!=nulls.length()0);6if(s!=null||s.length()0)7System.out.prin௲ 垎 뗐敔 敔垎�敘垎၈Ǔ瘓礀Ǡ 㰰Ǒ 㰰Ǒ ብ盂倶௬Ѐ 㼈௲ብ盂 Ѐ 㰰Ǒᰀ狣Ԝ盜Љ 䕄 夞ء盜 ᤀ 倘 ꋔ ᩄ 䓜䓨瑉浥
- 设有如下代码段 1 String s = null; 2 if ( s != null & s.length() > 0) 3 System.out.println("s != null & s.length() > 0"); 4 if ( s != null && s.length() > 0) 5 System.out.println("s != null & s.length() > 0"); 6 if ( s != null || s.length() > 0) 7 System.out.println("s != null & s.length() > 0"); 8 if ( s != null | s.length() > 0) 9 System.out.println("s != null | s.length() > 0"); 哪些行将抛出空指针异常?