Java“网红题”_java new char[]

public class Main {

	public static void main(String[] args) {
		
		int[] arr = new int[] {1,2,3};
		System.out.println(arr);//输出arr的地址值
		
		char[] arr1 = new char[] {'a','b','c'};
		System.out.println(arr1);//输出"abc"
	}
}
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import java.io.PrintStream;

public class Main {

	public static void main(String[] args) {
		
		int a = 10;
		int b = 10;
		method(a,b);//需要在method方法被调用后，仅打印出"a=100,b=200"，请写出method方法的代码
		
		System.out.println("a=" + a);
		System.out.println("b=" + b);
		
	}
	
//	public static void method(int a,int b) {
//		a = a * 10;
//		b = b * 20;
//		System.out.println("a=" + a);
//		System.out.println("b=" + b);
//		System.exit(0);
//	}
	
	public static void method(int a,int b) {
		
		PrintStream ps = new PrintStream(System.out) {
			//需要导包
			@Override
			public void println(String x) {
				if("a=10".equals(x)) {
					x="a=100";
				}else if("b=10".equals(x)) {
					x="b=200";
				}
				super.println(x);
			}
		};
		System.setOut(ps);
	}
}
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