一道基础题 看看能不能做对

public static void main(String[] args) {
String str1 = "abc";
String str2 = "abc";
System.out.print(str1 == str2);
System.out.print(str1.equals(str2));

String str3 = new String("abc");
String str4 = new String("abc");
System.out.print(str3 == str4);
System.out.print(str3.equals(str4));

StringBuffer str5 = new StringBuffer("abc");
StringBuffer str6 = new StringBuffer("abc");
System.out.print(str5 == str6);
System.out.print(str5.equals(str6));

Integer i1 = 10;
Integer i2 = 10;
System.out.print(i1 == i2);
System.out.print(i1.equals(i2));

Integer i3 = 300;
Integer i4 = 300;
System.out.print(i3 == i4);
System.out.print(i3.equals(i4));



}

#笔试题目#