java字符串操作

package com.basic;

import java.io.UnsupportedEncodingException;
/**
 * @des java字符串基本操作
 * @author zhaozhi3758
 *
 */
public class StringT {
	private String str;
	public String getStr() {
		return str;
	}
	public void setStr(String str) {
		this.str = str;
	}
	public void simpleT(){
		System.out.println("\""+str+"\".charAt(int index):"+str.charAt(0));
		System.out.println("\""+str+"\".endsWith(String str):"+str.endsWith("SD"));
		System.out.println("\""+str+"\".equals(String str):"+str.equals(""));
		System.out.println("\""+str+"\".startsWith(String str):"+str.startsWith("b"));
		System.out.println("\""+str+"\".startsWith(String str,int index):"+str.startsWith("",3));
		System.out.println("\""+str+"\".toLowerCase():"+str.toLowerCase());
		System.out.println("\""+str+"\".toUpperCase():"+str.toUpperCase());
		System.out.println("\""+str+"\".trim():"+str.trim());//忽略前导空白和尾部空白
		System.out.println("\""+str+"\".replace(char oldChar, char newChar):"+str.replace('s', 'p'));
		System.out.println("\""+str+"\".replace(String oldstr,String newstr):"+str.replace("s", "-pp-"));
	}
	public void indexOfT() {
		System.out.println("\""+str+"\".indexOf(String str):"+str.indexOf("ds"));//find nothing return -1
		System.out.println("\""+str+"\".indexOf(String str):"+str.indexOf("a",3));//从第三位索引，包括第三位
		System.out.println("\""+str+"\".lastIndexOf(String str):"+str.lastIndexOf("a"));//反向搜索
		System.out.println("\""+str+"\".lastIndexOf(String str):"+str.lastIndexOf("a",12));//反向搜索[索引数字还是从前计数，可设置无限大的值]
	}
	public void regexT(){//支持正则
		System.out.println("\""+str+"\".matches(regex):"+str.matches(".*\\d.*"));//.任意字符
		String s = "GET/index.html HTTP/1.1";
		System.out.print("\""+str+"\".split(regex):");
		String ss[] = s.split("/");
		for(String Str: ss)
		System.out.print(Str+" ");
		System.out.print("\n");
		System.out.println(str+"\".replaceAll(regex, replacement):"+str.replaceAll("\\w", ""));
	}
	public void substringT(){
		System.out.println("\""+str+"\".substring(int index):"+str.substring(1));
		System.out.println("\""+str+"\".substring(int beginIndex, int endIndex):"+str.substring(1,4));
	}
	public static void main(String[] args){
		StringT st=new StringT();
		st.setStr("adscWQQ34546add<s.SDSD");
		st.simpleT();
		System.out.println("----------------------------------");
		st.indexOfT();
		System.out.println("----------------------------------");
		st.regexT();
		System.out.println("----------------------------------");
		st.substringT();
		System.out.println("----------------------------------");
		try {
			String s=new String("我是大帅哥".getBytes(),"gbk");//将编码换为gbk
			System.out.println(new String(s.getBytes()));
		} catch (UnsupportedEncodingException e) {
			 e.printStackTrace();
		}
		
	}

}