java Beanshell不相等语句

Question

什么是beanshell中的if not equal语句？如果这是相等的：

if ("myVarValue".equals(vars.get("MY_VARIABLE")))

Answer 1

使用!一元数boolean逻辑补码运算符：

if (!"myVarValue".equals(vars.get("MY_VARIABLE")))

参考文献

• JLS 15.15.6 Logical Complement Operator ^{}

The type of the operand expression of the unary ! operator must be boolean or Boolean, or a compile-time error occurs. The type of the unary logical complement expression is boolean.

At run time, the operand is subject to unboxing conversion if necessary; the value of the unary logical complement expression is true if the (possibly converted) operand value is false and false if the (possibly converted) operand value is true.

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测试if (!something)的另一个选项是测试if (something == false)

相关问题

• Is it bad to explicitly compare against boolean constants e.g. ^{} in Java?