stringtest2.java

Java程序设计清华出版课件源码答案共十四章

class StringTest2{
	public static void main(String args[]) {
		String s1 = "This is the second string.";
		String s2 = "This is the second string.";
		String s3 = new String("This is the second string.");
		String s4 = new String(s1);
		String s5 = s1;

		boolean result121 = s1.equals(s2);
		boolean result122 = s1 == s2;
		boolean result131 = s1.equals(s3);
		boolean result132 = s1 == s3;
		boolean result141 = s1.equals(s4);
		boolean result142 = s1 == s4;
		boolean result151 = s1.equals(s5);
		boolean result152 = s1 == s5;

		System.out.println("s1 equals s2= " +result121);
		System.out.println("s1 == s2= " +result122);
		System.out.println("s1 equals s3= " +result131);
		System.out.println("s1 == s3= " +result132);
		System.out.println("s1 equals s4= " +result141);
		System.out.println("s1 == s4= " +result142);
		System.out.println("s1 equals s5= " +result151);
		System.out.println("s1 == s5= " +result152);

	}
}