lesson3.java

JAVA学习源代码,大家可以好好参考,请多提宝贵意见

import java.lang.*;
public class Lesson3
{
	static StringBuffer text;
	public static StringBuffer change1(StringBuffer text)
	{
		System.out.println(text);
		text=new StringBuffer("java!");
		
		System.out.println(text);
		return text;
	}
	public static void change2(StringBuffer text)
	{
		text=text.append("!");
		System.out.println(text);
	}
	
	public static void main(String args[])
	{
		StringBuffer sb1=new StringBuffer("Hello");
		StringBuffer sb2=new StringBuffer("Word");;
		change1(sb1);
		//sb1=text;
		change2(sb2);
		System.out.println(sb1.append(sb2));
		System.out.println(text);
		//System.out.println(change1(text));
		//a.printStaackTrace();*?*/
		/*StringBuffer a=new StringBuffer("Hello");
		StringBuffer b=a;
		/*String a=new String("Hello");
		String b=a;
		b="java";
		a=b;
		b.append("Word");
		System.out.println("a="+a);
		System.out.println("b="+b);*/
		//a.printStaackTrace();*/
		/*StringBuffer str=new StringBuffer("abcde");
		char ch[]={'A','B','C','D','E'};
		m1(str,ch);
		System.out.print(str+",");
		System.out.println(ch);
	}
	public static void m1(StringBuffer s,char ch[])
	{
		System.out.println(s);
		s=s.append("Hello");
		ch[3]='Z';*/
	}
}