7041af70657b001d1f82a15fad25e232

java程序设计教程的源码

public class T {
	public static void main(String args[]) {
		StringBuffer a = new StringBuffer("HelloWorld!");
		a.setLength(5);
		a.setCharAt(0, 'h');
		a.append("value");
		a.append(true);
		a.insert(15, "=");
		System.out.println(a);

	}
}