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47 lines
No EOL
1.5 KiB
Text
47 lines
No EOL
1.5 KiB
Text
#import "./common/common.typ" : *
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#show: template
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= Week 1
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== Exercise 1.1.5
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#embedClass(name: "UseArgument")
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Describe what happens if you try to execute `UseArgument` with each of the
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following command lines:
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#set enum(numbering: "a.")
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+ `java UseArgument java`
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Prints `java` as the name: `Hi, java. How are you?`
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+ `java UseArgument @!&^%`
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This will return different results depending on the shell you're using.
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If you pass those arguments directly as-is, it will just print `Hi, @!&^%. How are you?`.
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If your shell uses any of these characters, not all arguments may be passed to the java program, you may get an error, or get no output.
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For example, in a POSIX-compatible shell like bash, `&` is used as a delimiter to run programs asynchronously (return user control before the program finishes running), and otherwise acts as `;`. An error may be thrown due to `^%` not being a known command.
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+ `java UseArgument 1234`
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Prints `Hi, 1234. How are you?`
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+ `java UseArgument.java Bob`
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Newer Java versions run `javac` if a `.java` file is provided as the class name to run, and then run the compiled bytecode.
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+ `java UseArgument Alice Bob`
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Arguments are whitespace delimited (in most shells), and only the first one is read in the program:
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`Hi, Alice. How are you?`
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== Exercise 1.1.6
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Modify `UseArgument.java` to make a program `UseThree.java` that takes
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three names as command-line arguments and prints a proper sentence with the
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names in the rev
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#embedClass(name: "UseThree") |