숫자와 연산
public class Number {
public static void main(String[] args) {
System.out.println(6 + 2);
System.out.println(6 - 4);
System.out.println(6 * 2);
System.out.println(6 / 2);
System.out.println(Math.PI);
System.out.println(Math.floor(Math.PI));
System.out.println(Math.ceil(Math.PI));
}
}
문자열의 표현
public class StringApp {
public static void main(String[] args) {
System.out.println("HelloWorld");
System.out.println("H");
System.out.println('H');
System.out.println("Hello"
+ " World");
System.out.println("Hello \nWorld");
System.out.println("Hello \"World\"");
}
}
문자열 다루기
public class StringOperation {
public static void main(String[] args) {
System.out.println("Hello World".length());
System.out.println("Hello, [[[name]]] ... bye.".replace("[[[name]]]", "chanho"));
}
}