怎样判断字符串内容是否相等？

package zifuchuan;

public class StringDemo7 {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        String a=new String("lishuo");
        String b=new String("lishuo");
        //判断内容想等
        System.out.println(a.equals(b));
        //判断对象相等
        System.out.println(a==b);
        //字符串类比较内容相等用"equals()"方法，比较对象相等用"=="
    }

}