澳门平特一肖100%免费_Java与Hadoop集成开发

String concatenatedStr = str1 + " " + str2;

public class ExceptionExample { private static Exception exception = null; public static void main(String[] args) { System.out.println("main 方法开始"); System.out.println("main 调用前"); method1; if (exception == null) { System.out.println("main 调用后"); } else if (exception instanceof RuntimeException) { RuntimeException e = (RuntimeException) exception; exception = null; String s = e.getMessage; System.out.println(s); } System.out.println("main 方法结束"); } public static void method1 { System.out.println("method1 开始"); method2; if (exception != null) return; System.out.println("method1 结束"); } public static void method2 { System.out.println("method2"); String s = "消息：未知异常"; exception = new RuntimeException(s); return; } }

注意：在涉及大量字符串连接时/，使用 StringBuilder 或 StringBuffer 通常更加高效澳门平特一肖100%免费。

Box<Integer> integerBox = new Box<>(10);

System.out.println("Fruits in the ArrayList: " + fruits);