stringbuffertest.java

Java面向对象编程(随书配套源代码) 阐述了面向对象编程的思想

package chapter8;

public class StringBufferTest
{
    public static void main(String args[])
    {
        String str[] = new String[4]
        str[0] = “Deli”;
        str[1] = “Green”;
        //用字符串str[0]来构造一个StringBuffer
        StringBuffer strBuffer = new StringBuffer(str[0]);
        //在该StringBuffer对象位置0处即’D’之前，插入字符串str[1]
        strBuffer.insert(0, str[1]);
        //由StringBuffer对象strBuffer来构造生成字符串str[2]
        str[2] = new String(strBuffer);
        //缺省构造一个StringBuffer对象strBuffer，初始内容为空
        StringBuffer strBuffer = new StringBuffer();
        //在该StringBuffer对象strBuffer的末尾追加字符’G’
        strBuffer.append(‘G’);
        //在该StringBuffer对象strBuffer的末尾追加字符串”Deli137719164”
        strBuffer.append(“Deli” + 137719164);
        //在该StringBuffer对象strBuffer的位置1处即字符’G’后插入字符串”reen”
        strBuffer.insert(1, “reen”);
        //由StringBuffer对象strBuffer来构造生成字符串str[3]
        str[3] = new String(strBuffer);
        //遍历打印字符串数组的值
        for(int i = 0; i < 4; i ++)
            System.out.println(“str[” + i + “] = “ + str[i]);
    }
}