test5.java

来自「SCJP认证考试资料」· Java 代码 · 共 10 行

public class Test5 {
    public static void main(String[] args) {
	String space = "";
	String com = space + "Hello" + space + space;
	com.concat("world");
	String trimmed = com.trim();
	System.out.println(trimmed.length());
    }
}