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| package example; public class Example { public static void main(String[] args) { } } |
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| float length = 2.5f; double radius = 10024.5; intmeanOfLife = 42; Object object = new String("Hello, world!"); String b = "Once compiled, runs everywhere?"; |
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| importjava.util.Scanner; // importjava.util.Scanner; // public class Main { public static void main(String[] args) { Scanner sc = new Scanner(System.in); // Scanner inti = 2; System.out.print(": "); if(sc.hasNextInt()) { // i = sc.nextInt(); // System.out.println(i*2); } else { System.out.println(" "); } } } |
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| Importjava.util.Scanner; public class Main { public static void main(String[] args) { Scanner sc = new Scanner(System.in); String s1, s2; s1 = sc.nextLine(); s2 = sc.nextLine(); System.out.println(s1 + s2); } } |
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| public class Main { public static void main(String[] args) { String s1 = "firefox"; System.out.println(s1.toUpperCase()); // FIREFOX String s2 = s1.replace('o', 'a'); System.out.println(s2); // firefax System.out.println(s2.charAt(1)); // i inti; i = s1.length(); System.out.println(i); // 7 i = s1.indexOf('f'); System.out.println(i); // 0 i = s1.indexOf('r'); System.out.println(i); // 2 i = s1.lastIndexOf('f'); System.out.println(i); // 4 i = s1.indexOf('t'); System.out.println(i); // -1 i = s1.indexOf('r',3); System.out.println(i); // -1 } } |
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| public class Main { public static void main(String[] args) { Scanner sc = new Scanner(System.in); String s = sc.nextLine(); for(inti=0; i<s.length(); i++) { if(s.charAt(i) == ' ') { System.out.println(i); } } } } |
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