云大JAVA实验4Lab#4〔陆歌浩).docVIP

云南大学软件学院 实验报告 ： 序号： 姓名： 成绩： 实验4 Fundamental Programming Structures in Java: Strings 一、实验目的 练习Java基本编程结构，包括字符串，输入输出等。 二、实验内容 Program 1 Write a program called String1.java and do the following: Create a String object that accepts input from the user. Referencing the JDK docs, execute 2 different methods on the String. Print the results of the methods. Result: length of string is 11first 5 bytes of string are How a import javax.swing.JOptionPane; public class String1{ public static void main(String[] arg){ String inputValue = JOptionPane.showInputDialog(请输入一个字符串：); //接受用户输入的（字符串） StringBuffer temp=new StringBuffer(); temp.append(inputValue); JOptionPane.showMessageDialog(null, length of string is: + temp.length()+., 执行结果, JOptionPane.PLAIN_MESSAGE); JOptionPane.showMessageDialog(null, first 5 bytes of string are: + temp.substring(0,5)+., 执行结果, JOptionPane.PLAIN_MESSAGE); } } Program 2 Write a program called StringBuffer1.java that does the following: Create a StringBuffer object. Referencing the JDK docs, execute 2 different methods on the StringBuffer. Print the results of the methods. For example, using reverse() and replace() methods: Output: Input string reversed is: tset a si sihTReplacing characters 3 thru 5 with * looks like: ts*** si sihT import javax.swing.JOptionPane; public class StringBuffer1{ public static void main(String[] arg){ String inputValue = JOptionPane.showInputDialog(请输入一个字符串：); //接受用户输入的（字符串） StringBuffer temp=new StringBuffer(); temp.append(inputValue); String str=***; JOptionPane.showMessageDialog(null, Input string reversed is: + temp.reverse(), 执行结果, JOptionPane.PLAIN_MESSAGE); JOptionPane.showMessageDialog(null, Replacing characters 3 thru 5 with * looks like: + temp.replace(2, 5, str)+., 执行结果, JOptionPane.PLAIN_MESSAGE); } } Program 3 Write a program called StringTokenizer1.java that accepts a string, looks for commas within the string, and breaks the string u