キャストする
public static void main(String[] args){
double d = 52343.231;
int i = (int)d;
System.out.println(i);
}
[vagrant@localhost java]$ javac MyApp.java
[vagrant@localhost java]$ java Myapp
エラー: メイン・クラスMyappが見つからなかったかロードできませんでした
[vagrant@localhost java]$ java MyApp
52343
if文
public static void main(String[] args){
int score = 85;
if(score > 80){
System.out.println("great");
}
}
public static void main(String[] args){
int score = 85;
String msg = score > 80 ? "great" : "soso..!";
System.out.println(msg);
}
switch
public static void main(String[] args){
String signal = "red";
switch(signal) {
case "red":
System.out.println("stop!");
break;
case "blue":
System.out.println("go");
break;
case "yello":
System.out.println("caution");
break;
default:
System.out.println("wrong signal!");
break;
}
}
public static void main(String[] args){
int i = 0;
while (i < 10){
System.out.println(i);
i++;
}
}
[/java]
[vagrant@localhost java]$ java MyApp
0
1
2
3
4
5
6
7
8
9
こうも行ける。
[java]
public static void main(String[] args){
int i = 0;
do {
System.out.println(i);
i++;
}
while (i < 10);
}
[/java]
[java]
public static void main(String[] args){
for (int i = 0; i < 10; i++){
System.out.println(i);
}
}
[/java]
break, continue
[java]
public static void main(String[] args){
for (int i = 0; i < 10; i++){
if (i==5){
continue;
}
System.out.println(i);
}
}
[/java]
うおおおおおおお、短期間で詰め込んでるな
