print() 和 println() 命令；

System.out.println("Diego");
System.out.println(3);
System.out.println("Rain" + "In" + "Spain");

System.out.println(1 + 3);
System.out.println("1" + "3");
System.out.println(1 + "3");
System.out.println("1" + 3);
System.out.println("1" + (1 + 3));

System.out.println("Amigo is the best!");
System.out.println("Amigo" + "is the best!");
System.out.println("Amigo" + " " + "is the best!");

System.out.println(3 * 3 + 4 * 4);
System.out.println(1 * 2 + 3 * 4);

System.out.print("Diego");
System.out.print("Diego");
System.out.print("Diego");

System.out.print("Diego ");
System.out.println("is the best!");
System.out.print("Amigo ");
System.out.println("is the best!");