调用以下类D和E的main() 方法的输出结果为？class D { public static void main(String[] args) { String s1 = new String("hello"); String s2 = new String("hello"); if (s1.equals(s2)) System.out.println("equal"); else System.out.println("not equal"); }} class E { public static void main(String[] args) { StringBuffer sb1 = new StringBuffer("hello"); StringBuffer sb2 = new StringBuffer("hello"); if (sb1.equals(sb2)) System.out.println("equal"); else System.out.println("not equal"); }}
A: D: equal; E: equal
B: D: not equal; E: not equal
C: D: equal; E: not equal
D: D: not equal; E: equal
A: D: equal; E: equal
B: D: not equal; E: not equal
C: D: equal; E: not equal
D: D: not equal; E: equal
举一反三
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- 下列语句输出结果为( )。public class test{public static void main(String args []){String s1=new String("How");String s2=new String("How");System.out. println(!(s1 ==s2));} A: false B: true C: 1 D: 0
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