"Java编程题集：输出你好！及判断闰年"

This is a summary of the Java programming questions and answers provided in the document "JAVA编程题全集(100题及答案).doc". The document contains 100 Java programming questions and their corresponding answers. In addition to this, there is also a review question on Java programming. The first question in the document is to write a Java program that outputs "你好！" (Hello!) on the screen. The program is named Helloworld.java and it contains only one class named Helloworld. The main method of this class is used to print the message "你好！" using the System.out.print method. The second question in the document asks to write a Java program that determines whether a given year is a leap year or not using if-else statements. The program is named LeapYear.java and it contains a main method. The year to be checked is initially set to 2010, but it can be changed by passing a command-line argument. The program checks if the remainder of the year divided by 4 is 0 and prints whether it is a leap year or not. Overall, the document provides a variety of Java programming questions and their answers. These questions cover different aspects of Java programming such as basic syntax, conditional statements, loops, and more. By practicing these questions, one can improve their understanding and skills in Java programming.