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🎉 感谢提交Pull Request！请稍等片刻，我们已经将其提交到CI进行检查，一旦有结果会立即通知您！ |
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Jan 23, 2021
| // 注意，若参数为null，则当作0处理，即add("123", null)=="123", add(null, null)=="0" | ||
| public static String add(String a, String b) {} | ||
| public static String add(String a, String b) { | ||
| if ( a == null ){ |
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'(' 后不应有空格。
')' 前不应有空格。
'{' 前应有空格。
| public static String add(String a, String b) {} | ||
| public static String add(String a, String b) { | ||
| if ( a == null ){ | ||
| a = "0"; |
| if ( a == null ){ | ||
| a = "0"; | ||
| } | ||
| if ( b == null){ |
| a = "0"; | ||
| } | ||
| if ( b == null){ | ||
| b = "0"; |
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完成 原生数据类型与装箱类型训练 第二题