string007.java

孙鑫JAVA从入门到精通配套练习程序。所有程序都实际运行过

class StringTest
{
	public static void main(String[] args)
	{
		/*
		String str1 = new String("abc");
		String str2 = new String("abc");
		String str3 = str1;
		if (str1.equals(str2))
		{
			System.out.println("str1==str2");
		}
		else
		{
			System.out.println("str1 != str2");
		}
		*/
		
		String str1 = new String("abc");
		int i = 5;
		float f = 1.35f;
		char ch = 'h';
		boolean bool = true;
		System.out.println(str1 + i + f + ch +bool);
		
		StringBuffer str = new StringBuffer();
		str.append(str1).append(i).append(bool);
		System.out.println(str);
		str.delete(3, 6);
		System.out.println(str);
		str.insert(0, "oyqd");
		System.out.println(str);
	}
}