K227 Java 2

Size: px

Start display at page:

Download "K227 Java 2"

みがねさんきち
7 years ago
Views:

1 1

2 K227 Java 2

3 3

4 4

5 5

6 6

7 Java 7

8 class Sample1 { public static void main (String args[]) { System.out.println( Java! ); } } 8

9 > javac Sample1.java 9

10 10

11 > java Sample1 Java 11

12 12

13 13

14 C: Program Files Java jdk1.5.0_06 bin; 14

15 15

16 // class Sample1 { public static void main (String args[]) { System.out.println( Java! ); System.out.println( Java ); } } 16

17 17

18 18

19 19

20 100 is the value of num. 20

21 21

22 A 22

23 23

24 byte short int long float double char boolean true or false 24

25 int number; char c; double f1, f2; 25

26 number = 10; c = ; f1 = 1.41; f2 = number*f1; 26

27 int number = 10; char c = ; double f1 = 1.41, f2 = 2.4; 27

28 int number = 10; System.out.println(number); 28

29 int number = 10; System.out.println(number); number = 30; System.out.println(number); double f1 = 3.14, f2=0.9; f2 = f1; System.out.println(f2); 29

30 int num = 10; double d = num; System.out.println(num); System.out.println(d);

31 double pi = 3.14; int num = (int) pi; System.out.println(pi); System.out.println(num);

32 32

33 33

34 34

35 3 35

36 a = b a = a b 36

37 int d = 2; double pi = 3.14; System.out.println(d*pi);

38 38

39 public class rensyu2 { public static void main(string args[]) { System.out.println(5/2*3); System.out.println(5/2*3.0); System.out.println(5.0/2*3); System.out.println(5/2.0*3); } } 39

40 40

41 i i i i i 41

42 42

43 43

44 import java.io.*; public class { public static void main(string args[]) throws IOException {... BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); String str = br.readline(); } System.out.println(str + ); } 44

45 What is your name? Hideaki Your name is Hideaki. 45

46 import java.io.*; public class { } public static void main(string args[]) throws IOException {... BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); String str = br.readline(); int num =Integer.parseInt(str); System.out.println(num + ); } 46

47 int num = Interger.parseInt(str); double num = Double.parseDouble(str); 47

48 48

49 import java.io.*; class test1 { public static void main(string args[]) throws IOException {... BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); String str1 = br.readline(); String str2 = br.readline(); } System.out.println( +str1+ ); System.out.println( +str2+ ); } 49

50 50

51 51

52 52

53 53

54 60 < 60 true false 54

55 55

56 ==!= 56

57 if if { ; 2;... } 57

58 if { ; } else { ; } if { ;... } else { ;... } 58

59 if { ;... } else if { ;... }... else { ; } 59

60 60

61 && 61

62 { case : break; case break; default: break; } 62

63 63

64 64

65 ... } 65

66 } } } 66

67 } 67

68 { ;... } 68

69 for while for while 69

70 for while for } while } 70

71 ... ; } 71

72 while do while 72

73 while } do while } 73

74 } 74

75 } 75

76 76

77 A A 77

78 A 78

79 79

80 80

81 ten[0] ten[1] ten[2] ten[3] ten 81

82 ten[0] ten[1] ten[2] ten[3] ten 82

83 83

84 84

85 int int int ten[]; or int [] ten; int i, j, k; ten = new int[3]; ten[0] = 90; ten[1] = 80; ten[2] = 70; System.out.println(ten[0]); System.out.println(ten[1]); System.out.println(ten[2]); i = 90; j = 80; k = 70; System.out.println(i); System.out.println(j); System.out.println(k); 85

86 ten[0][0] ten[0][1] ten[0][2] ten[1][0] ten[1][1] ten[1][2] ten[2][0] ten[2][1] ten[2][2] 86

87 87

88 88

89 ten[0][0] ten[1][0] ten[2][0] ten[0][1] ten[1][1] ten[2][1] 89

90 ten[0][0] ten[1][0] ten[2][0] ten[0][1] ten[0][2] ten[1][1] 90

91 91

92 92

93 93

94 94

95 95

97 97

98 98

99 99

100

101 101

102 102

103 103

104

105 105

106 106

107 107

108 108

109 109

110 110

111

112 112

113 113

114 114

115 115

116 116

117 117

118 118

119 119

120 120

121 121

122 122

123

124 124

125 125

126 126

127 127

128 128

129 129

130 130

131 131

132 132

133 133

134 134

135 135

136 136

137 #1 137

138 138

139 Vehicle Car Plane 139

140 140

141 Vehicle Car Plane 141

142 142

143 143

144 144

145 145

146 146

147 147

148 148

149 149

150 150

151 ivehicle imaterial Car 151

152 152

Java プログラミング Ⅰ 7 回目 switch 文と論理演算子今日の講義講義で学ぶ内容 switch 文論理演算子条件演算子条件判断文 3 switch 文 switch 文式が case のラベルと一致する場所から直後の break; まで処理しますどれにも一致致しない場合 def

Java プログラミング Ⅰ 7 回目 switch 文と論理演算子今日の講義講義で学ぶ内容 switch 文論理演算子条件演算子条件判断文 3 switch 文 switch 文式が case のラベルと一致する場所から直後のまで処理しますどれにも一致致しない場合 default: から直後のまで処理します式の結果ラベル定数整数または文字 (byte, short, int,