lx2_7.java

针对越来越多的用户喜欢JAVA

public class Lx2_7
{
  public static void main(String args[])
  {
    StringBuffer sb1=new StringBuffer();
    StringBuffer sb2=new StringBuffer(15);
    StringBuffer sb3=new StringBuffer("Hello,My friends!");
    char cArray[]=new char[20];
    sb1.append("are you empty?");
    sb1.append("why?");
    sb1.getChars(4,sb1.length()-4,cArray,0);
    System.out.println(cArray);
    for(int i=0,j=0;i<cArray.length;i++)
      if(cArray[i]>'m')
        sb2.insert(j++,cArray[i]);
    sb3.setCharAt(0,'h');
    sb3.setCharAt(6,'m');
    System.out.println(sb1);
    System.out.println(sb2);
    System.out.println(sb3);
}
}