结果如图

 

package com.softeasy.test1;

public class String_trim {

	public static void main(String[] args) {
		String str = "   slkjfsj sdfjf jsjs    ";
		System.out.println("没有用trim()方法前str为：|" + str + "|");
		str = str.trim();
		System.out.println("用了trim()方法后str为：|" + str + "|");
	}

}