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ËÄ¡¢ÔĶÁÏÂÁгÌÐò£¬Çëд³ö³ÌÐòµÄÊä³ö½á¹û 1.

class B { int b; B(int x) { b = x;

System.out.println(\

}

}

class A extends B { int a;

A(int x, int y) { super(x); a = y; System.out.println(\£¬a=\

}

( ) ( )

( )

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}

public class Test {

}

public static void main(String[] args) { }

A obj = new A(13, 23);

´ð°¸ b=13 b=13£¬a=23 2.

public class Test1 { }

class AB { }

´ð°¸ Hello!I love JAVA. 3.public class Test {

public static void main(String[] args) { String s1; String s2;

AB(String str1, String str2) { }

public String toString() { }

return s1 + s2; s1 = str1; s2 = str2;

public static void main(String[] agrs) { }

AB s = new AB(\System.out.println(s.toString());

}

}

int[][] num1 = new int[2][3]; num1[0][0] = 3; num1[0][1] = 9; num1[0][2] = 60; num1[1][0] = 78; num1[1][1] = 79;

for (int i = 0; i <= 1; i++) { }

for (int j = 0; j < num1[i].length; j++)

System.out.print(num1[i][j] + \

System.out.println();

´ð°¸

3 9 60 78 79 0

4. public class Test {

public static void main(String[] agrs) { } ´ð°¸ s=30 s=90 s=180

int i, s = 0;

int a[] = { 10, 20, 30, 40, 50, 60, 70, 80, 90 }; for (i = 0; i < a.length; i++) }

if (a[i] % 3 == 0) { }

s += a[i];

System.out.println(\

5. public class Test3 {

public static void main(String[] agrs) { }

} class A {

private int privateVar;

public A(int _privateVar) { boolean isEqualTo(A anotherA) { } } ´ð°¸ false

if (this.privateVar == anotherA.privateVar) else

return false;

return true;

privateVar = _privateVar;

}

A a = new A(2);

A b = new A(3);

System.out.println(a.isEqualTo(b));

6. public class Test {

public static void main(String[] args) {

int[][] num1 = new int[2][3]; num1[0][0] = 3; num1[1][0] = 78;

num1[0][1] = 9;

num1[0][2] = 45;

num1[1][1] = 79;

for (int i = 0; i <= 1; i++) { }

int[][] num2 = new int[][] { { 1, 2, 3 }, { 7, 8 } ,{ 9 } }; for (int i = 0; i

for (int j = 0; j < num1[i].length; j++)

System.out.print(num1[i][j] + \

System.out.println();