If [-n "$JAVA_HOME"]; The value of the mean $JAVA

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If [-n "$JAVA_HOME"]; The value of the mean $JAVA_HOME is empty?

Time：05-17

If [-n "$JAVA_HOME"]; The value of the mean $JAVA_HOME is empty?

CodePudding user response:

If [-n str1] when the length of the string is greater than zero is true (string is not empty)

Refers to the value $JAVA_HOME