1.直接上代码
package com.examplezhc.demo;
import android.os.Bundle;
import android.app.Activity;
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
String str = " Hello Word! ";
//方法1:String.trim();trim()是去掉首尾空格
System.out.println("1:"+str.trim());
//方法2:str.replaceAll(" ", ""); 去掉所有空格,包括首尾、中间
String str2 = str.replaceAll(" ", "");
System.out.println("2:"+str2);
//方法3:或者replaceAll(" +",""); 去掉所有空格,包括首尾、中间
String str3 = str.replaceAll(" +", "");
System.out.println("3:"+str3);
//方法4:、str = .replaceAll("\\s*", "");可以替换大部分空白字符, 不限于空格 ; \s 可以匹配空格、制表符、换页符等空白字符的其中任意一个。
String str4 = str.replaceAll("\\s*", "");
System.out.println("4:"+str4);
}
}
2.打印结果:
10-11 11:59:43.195: I/System.out(4449): 1:Hello Word!
10-11 11:59:43.195: I/System.out(4449): 2:HelloWord!
10-11 11:59:43.195: I/System.out(4449): 3:HelloWord!
10-11 11:59:43.205: I/System.out(4449): 4:HelloWord!
3.参考博文:
http://zhidao.baidu.com/link?url=99-shJbqbq7t37p0CDe4t62uoy882z2aXm_87TECuc4ivtPe-uGwiifrMYd9fA4uwYrMg565pD8aerwJ7X8PR_
http://blog.csdn.net/hmyang314/article/details/37883563