練習問題

$ java ComparingString hoge KSU KSU_AP KSU_AP2
渡された文字列は "KSU_AP"ではなく"hoge"です．
渡された文字列は "KSU_AP"ではなく"KSU"です．
渡された文字列は "KSU_AP" です．
渡された文字列は "KSU_AP"ではなく"KSU_AP2"です．

$ java ArgsReverser abcdefg
abcdefg, gfedcba
$ java ArgsReverser abcdefg foobar
abcdefg, gfedcba
foobar, raboof
$ java ArgsReverser Haruaki Tamada
Haruaki, ikauraH
Tamada, adamaT

$ yes
y
y
y
... 途中省略
^C # Ctrl-C を入力し，強制終了
$ yes no
no
no
... 途中省略
^C # Ctrl-C を入力し，強制終了
$ java Yes
y
y
... 途中省略
^C # Ctrl-C を入力し，強制終了
$ java Yes yes
yes
yes
... 途中省略
^C # Ctrl-C を入力し，強制終了

$ cat string.txt
String class represents character strings.
All string literals in Java programs, such as "abc", are implemented as instances of this class.
Strings are constant; their values cannot be changed after they are created.
String buffers support mutable strings.
Because String objects are immutable they can be shared.
$ sort string.txt
All string literals in Java programs, such as "abc", are implemented as instances of this class.
Because String objects are immutable they can be shared.
String buffers support mutable strings.
String class represents character strings.
Strings are constant; their values cannot be changed after they are created.
$ java Sorter string.txt
All string literals in Java programs, such as "abc", are implemented as instances of this class.
Because String objects are immutable they can be shared.
String buffers support mutable strings.
String class represents character strings.
Strings are constant; their values cannot be changed after they are created.
$ cat string2.txt
abra
cada
bra
abc
def
$ java Sorter string2.txt
abc
abra
bra
cada
def

ArrayList<String> list = // ArrayListの実体を作成する．
Collections.sort(list); // => list の内容が要素を並び替えたものになっている．

$ cat sample2.txt
ABCDEFG

1234567890
$ java Tac sample2.txt
1234567890

ABCDEFG
$ cat sample3.txt
abracadabra
$ java Tac sample3.txt
abracadabra

Double degree = // 度数法による角度
Double radian = Math.toRadians(degree); // 弧度法による角度

$ cat string.txt
String class represents character strings.
All string literals in Java programs, such as "abc", are implemented as instances of this class.
Strings are constant; their values cannot be changed after they are created.
String buffers support mutable strings.
Because String objects are immutable they can be shared.
$ java Frequencies string.txt
All: 1
"abc",: 1
constant;: 1
be: 2
string: 1
instances: 1
.... 以下略

$ cat string.txt
String class represents character strings.
All string literals in Java programs, such as "abc", are implemented as instances of this class.
Strings are constant; their values cannot be changed after they are created.
String buffers support mutable strings.
Because String objects are immutable they can be shared.
$ tail -1 string.txt
Because String objects are immutable they can be shared.
$ java Tail 2 string.txt
String buffers support mutable strings.
Because String objects are immutable they can be shared.
$ java Tail 10 string.txt
String class represents character strings.
All string literals in Java programs, such as "abc", are implemented as instances of this class.
Strings are constant; their values cannot be changed after they are created.
String buffers support mutable strings.
Because String objects are immutable they can be shared.

$ ls
GZip.java       GZip.class
$ java GZip GZip.java # GZip.java を圧縮する．
GZip.java: 1152 bytes -> 426 bytes (36.98%)
$ ls
GZip.java       GZip.java.gz    GZip.class # Gzip.java.gz が作成されている
$ mv GZip.java GZip.java.back # Gzip.java の名前を変更する．
$ gunzip GZip.java.gz         # Gzip.java.gz を解凍し，Gzip.javaを得る．
$ ls
GZip.java       GZip.java.back  GZip.java.gz    GZip.class
$ java GZip GZip.java GZip.class
GZip.java: 1152 bytes -> 426 bytes (36.98%)
GZip.class: 1708 bytes -> 1010 bytes (59.13%)

$ java ReversePolishNotationCalculator "1 2 +"
3.000000 (1 2 +)
$ java ReversePolishNotationCalculator "1 2 +" "3 4 +"
3.000000 (1 2 +)
7.000000 (3 4 +)
$ java ReversePolishNotationCalculator "1 2 + 9 6 - *"
9.000000 (1 2 + 9 6 - *)

$ java StringSimilarities distance similarity
simpson(distance, similarity)=0.500000
jaccard(distance, similarity)=0.333333
dice(distance, similarity)=0.500000
cosine(distance, similarity)=0.530330
edit_distance(distance, similarity)=8
$ java StringSimilarities android ipodtouch
simpson(android, ipodtouch)=0.500000
jaccard(android, ipodtouch)=0.272727
dice(android, ipodtouch)=0.428571
cosine(android, ipodtouch)=0.502519
edit_distance(android, ipodtouch)=7

ArrayList<Character> getList(String item){
    ArrayList<Character> list = new ArrayList<Character>();
    for(Integer i = 0; i < item.length(); i++){
        Character c = item.charAt(i);
        if(!list.contains(c)){
            list.add(c);
        }
    }
    return list;
}

Table<String> table = new Table<String>(41, 21);
table.set("X", 0, 1);
String item = table.get(0, 1);