LUC-COMP-141/CreateJavaClass.sh at main · alexsobiek/LUC-COMP-141 · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
#!/bin/bash

#

# A script to prebuild a Java class file

#

# Assume that this script accepts an argument, e.g.

#   new_class ClassName

# and this argument becomes the name of the class


# First, let's make sure that the file name is not empty. If it is,

# display a diagnostic message and end the script.

if [ -z "$1" ]; then

  echo "File name is empty! Script ends now."

  exit 1
fi

if [[ $1 =~ @ ]]; then

    echo "Character '@' is not allowed in the class name"

    exit 2

fi

if [[ ! $1 =~ ^[A-Za-z] ]]; then

  echo "$1 is not a valid Java class name"

  exit 2

fi


# Now that we know the file name is not empty, assign to variable.

filename="$1.java" # The destination of the script's output


# Check if file already exists

if [ -f "$filename" ]; then

  echo "File $filename already exists. Overwrite it? (y/n)"

  read overwrite

  if [ "$overwrite" == "n" ]; then

    echo "OK, I will not overwrite the file. Script ends now."

    exit 2

  fi

fi


# Create a variable for the class name. This is the same as $1, so it is # not really necessary, but it makes the code more readable.


classname="$1" # Arguments passed are mapped to $1, $2, ...


cat << _EOF_ > $filename

/**

* Class $classname

*/

public class $classname {

  public static void main(String[] args) {

  } // method main

}

_EOF_

echo "File $filename successfully created."