java中字符串在堆，栈，以及字符串池中的存储分配模式，运行如下程序，及可知。 public class StringTest{			//测试string字符串在堆，栈以及字符串池中的存储分配	public static void main(String[] args){		String string1 = "a";		String  string2 = "b";		String string3 = "ab";		String string5 = "a"+"b";		final String string7 = "a";		final String string9 = "b";		String string4 = string1 + string2;		String string6 = string7+"b";		String string8 = string1+"b";		String string11 = "abc".substring(0,2);		String string10 = string7 +string9;		System.out.println(string4 == string3);		System.out.println(string5 == string3);		System.out.println(string6 == string3);		System.out.println(string8 == string3);		System.out.println(string7 == string1);		System.out.println(string10 == string3);		System.out.println(string11 == string3);	}}